Oil and gas refinery, petrochemical projects contributing to the renaissance of the Saudi national economy, metal and chemical industries, oil factories in the Kingdom of Saudi Arabia, quality of oil production plants and equipment, large illuminated industrial facilities
Metal towers and structures in desert lands, oil and gas refineries, fuel factories and mines in the Kingdom of Saudi Arabia, large and huge warehouses and tanks, petrochemical industries and projects, the concept of petroleum engineering in the Gulf countries, the renaissance of the Saudi national economy.
The concept of petroleum engineering in the Gulf countries, petrochemical industries and projects, gas refinery, the renaissance of the Saudi national economy, the view of large and huge warehouses and tanks, oil factories and laboratories in the Kingdom of Saudi Arabia
Oil factories in Saudi Arabia, quality of oil production plants and equipment, huge illuminated industrial facilities, oil and gas refinery, petrochemical projects contributing to the renaissance of the Saudi national economy, metal and chemical industries, a sky full of stars
Fuel factories and mines in the Kingdom of Saudi Arabia, large and huge warehouses and tanks, metal towers and structures in desert lands, oil and gas refineries, petrochemical industries and projects, the concept of petroleum engineering in the Gulf countries, the renaissance of the Saudi national economy.
Petrochemical industries and projects, the concept of petroleum engineering in the Gulf States, the renaissance of the Saudi national economy, towers and metal structures in desert lands, large and huge warehouses and tanks, oil and gas refineries, fuel factories and mines in the Kingdom of Saudi Arabia
The concept of petroleum engineering in the Gulf countries, the renaissance of the Saudi national economy, oil and gas refineries, petrochemical industries and projects, towers and metal structures in desert lands.
Petrochemical projects contribute to the renaissance of the Saudi national economy, oil factories and plants in the Kingdom of Saudi Arabia, the concept of petroleum engineering in the Gulf States, lighting towers and metal structures at dawn, large and huge warehouses and tanks, oil and gas refinery
Towers and metal structures in desert lands, oil and gas refineries, petrochemical industries and projects, the concept of petroleum engineering in the Gulf countries, the renaissance of the Saudi national economy, large and huge warehouses and tanks, fuel factories and mines in the Kingdom of Saudi Arabia
Large and massive storage tanks, towers and metal structures in desert lands, oil and gas refineries, petrochemical industries and projects, the concept of petroleum engineering in the Gulf countries, the renaissance of the Saudi national economy, fuel factories and mines in the Kingdom of Saudi Arabia
Oil factories and plants in the Kingdom of Saudi Arabia, the renaissance of the Saudi national economy, oil and gas refining, the concept of petroleum engineering in the Gulf States, large and huge warehouses and tanks, petrochemical industries and projects
Petrochemical industries and projects, the concept of petroleum engineering in the Gulf countries, the renaissance of the Saudi national economy, oil and gas refineries, towers and metal structures in desert lands.
Renaissance of the Saudi national economy, the concept of petroleum engineering in the Gulf countries, petrochemical industries and projects, gas refinery, view of large and huge warehouses and tanks, oil factories and laboratories in the Kingdom of Saudi Arabia
Quality of machinery and equipment in factories that extract oil wealth from the depths of the seas, the concept of petroleum engineering in the Gulf States, oil and gas refinery, petrochemical industries and projects, the renaissance of the Saudi national economy, oil factories in the Kingdom of Saudi Arabia
Petrochemical projects contributing to the renaissance of the Saudi national economy, sunset view of the sky with high illuminated structures, petroleum engineering field in the Gulf countries, oil and gas refinery, oil factories and plants in the Kingdom of Saudi Arabia, large and huge warehouses and tanks
Lighting towers and metal structures at night, oil factories and plants in the Kingdom of Saudi Arabia, the concept of petroleum engineering in the Gulf countries, oil and gas refineries, petrochemical industries and projects, the renaissance of the Saudi national economy, large and huge warehouses and tanks
The concept of petroleum engineering in the Gulf countries, petrochemical industries and projects, gas refinery, the renaissance of the Saudi national economy, the view of large and huge warehouses and tanks, oil factories and laboratories in the Kingdom of Saudi Arabia
Petrochemical projects contributing to the renaissance of the Saudi national economy, metal and chemical industries, oil factories in the Kingdom of Saudi Arabia, quality of petroleum production plants and equipment.
Quality of machinery and equipment in factories that extract oil wealth from the depths of the seas, the concept of petroleum engineering in the Gulf States, oil and gas refinery, petrochemical industries and projects, the renaissance of the Saudi national economy, oil factories in the Kingdom of Saudi Arabia
Steel Pipelines and Cables, Petrochemical Industries and Projects, Pollution from Oil Production, Oil and Gas Refinery in Industrial Area, Factories and Plants in Saudi Arabia, Large and Huge Warehouses, Industrial Engineering and Equipment
Towers and metal structures in desert lands during the day, large and huge warehouses and tanks, the renaissance of the Saudi national economy, petrochemical industries and projects, the concept of petroleum engineering in the Gulf countries, oil and gas refineries, fuel factories and mines in the Kingdom of Saudi Arabia
Oil and gas refineries, petrochemical industries and projects, the concept of petroleum engineering in the Gulf countries, the renaissance of the Saudi national economy, towers and metal structures in desert lands, large and huge warehouses and tanks, fuel factories and mines in the Kingdom of Saudi Arabia
Oil and gas refinery, petrochemical projects contributing to the renaissance of the Saudi national economy, oil factories and plants in the Kingdom of Saudi Arabia, the concept of petroleum engineering in the Gulf countries, large and huge warehouses and tanks
Petrochemical industries and projects, the concept of petroleum engineering in the Gulf countries, the gas refinery, the renaissance of the Saudi national economy, the view of large and huge warehouses and tanks at sunset, oil factories and laboratories in the Kingdom of Saudi Arabia
Oil and gas refineries, petrochemical industries and projects, the concept of petroleum engineering in the Gulf countries, the renaissance of the Saudi national economy, towers and metal structures in desert lands, large and huge warehouses and tanks, fuel factories and mines in the Kingdom of Saudi Arabia
Oil and gas refinery in industrial area amidst forests and nature, steel pipelines and cables, petrochemical industries and projects, pollution resulting from oil production, factories and plants in Saudi Arabia, huge and large warehouses, industrial engineering and equipment
Large and huge warehouses and tanks, fuel factories and mines in the Kingdom of Saudi Arabia, metal towers and structures in desert lands, oil and gas refineries, petrochemical industries and projects, the concept of petroleum engineering in the Gulf countries, the renaissance of the Saudi national economy.
Towers and metal structures in the lands, the renaissance of the Saudi national economy, desert, large and huge warehouses and tanks, petrochemical industries and projects, the concept of petroleum engineering in the Gulf countries, oil and gas refineries, fuel factories and mines in the Kingdom of Saudi Arabia
Petrochemical industries and projects, oil and gas refinery, oil factories and plants in the middle of the snowy nature and cold weather of the Kingdom of Saudi Arabia, the renaissance of the Saudi national economy, lighting towers and metal structures, the concept of petroleum engineering in the Gulf countries
Large and massive storage tanks, towers and metal structures in desert lands, oil and gas refineries, petrochemical industries and projects, the concept of petroleum engineering in the Gulf countries, the renaissance of the Saudi national economy, fuel factories and mines in the Kingdom of Saudi Arabia
Saudi National Economy Revival, Towers and Metal Structures in Desert Lands, Large and Huge Warehouses and Tanks, Petrochemical Industries and Projects, Petroleum Engineering Concept in Gulf Countries, Oil and Gas Refineries, Fuel Factories and Mines in Saudi Arabia
Metal and chemical industries, oil factories in Saudi Arabia, quality of petroleum production plants and equipment, large illuminated industrial facilities, oil and gas refinery, petrochemical projects contributing to the renaissance of the Saudi national economy
Towers and metal structures in desert lands at night, large and huge warehouses and tanks, renaissance of the Saudi national economy, petrochemical industries and projects, the concept of petroleum engineering in the Gulf countries, oil and gas refineries, fuel factories and mines in the Kingdom of Saudi Arabia
Large and huge warehouses and tanks, fuel factories and mines in the Kingdom of Saudi Arabia, metal towers and structures in desert lands, oil and gas refineries, petrochemical industries and projects, the concept of petroleum engineering in the Gulf countries, the renaissance of the Saudi national economy.
The concept of petroleum engineering in the Gulf countries, oil and gas refineries, petrochemical industries and projects, the renaissance of the Saudi national economy, the view of large and huge warehouses and tanks at night, oil factories and laboratories in the Kingdom of Saudi Arabia
Saudi National Economy Revival, Large and Huge Storage Tanks, Towers and Metal Structures in Desert Lands, Oil and Gas Refineries, Petrochemical Industries and Projects, Petroleum Engineering Concept in Gulf Countries, Fuel Factories and Mines in Saudi Arabia
The renaissance of the Saudi national economy, oil factories in the Kingdom of Saudi Arabia, the quality of machinery and equipment in the factories that extract oil wealth from the depths of the seas, the concept of petroleum engineering in the Gulf countries, oil and gas refinery, petrochemical industries and projects
Steel Pipes and Cables, Oil and Gas Refinery Plant in Industrial Area, Factories and Plants in Saudi Arabia, Large and Huge Warehouses, Industrial Engineering and Equipment, Petrochemical Industries and Projects
Steel pipelines and cables, quality of petroleum production plants and equipment, large industrial facilities, petrochemical projects contributing to the renaissance of the Saudi national economy, oil factories in the Kingdom of Saudi Arabia, metals and chemicals industries
Oil production in the Kingdom, factories and plants in Saudi Arabia at sunset, industrial engineering and equipment, petrochemical industries and projects, economic growth and progress, refinery smoke factories, oil and gas refining plant, huge and large warehouses, view of factory smoke in the air
Petrochemical projects contribute to the renaissance of the Saudi national economy, view of the sky at dusk with high illuminated structures, field of petroleum engineering in the Gulf countries, oil and gas refinery, oil factories and plants in the Kingdom of Saudi Arabia, large and huge warehouses and tanks
Towers and metal structures in desert lands during the day, large and huge warehouses and tanks, the renaissance of the Saudi national economy, petrochemical industries and projects, the concept of petroleum engineering in the Gulf countries, oil and gas refineries, fuel factories and mines in the Kingdom of Saudi Arabia
Oil and gas refineries, petrochemical industries and projects, the concept of petroleum engineering in the Gulf countries, the renaissance of the Saudi national economy, towers and metal structures in desert lands, large and huge warehouses and tanks, fuel factories and mines in the Kingdom of Saudi Arabia
Pollution from petroleum production, petrochemical industries and projects, steel pipelines and cables, oil and gas refinery in industrial area, factories and plants in Saudi Arabia, large and huge warehouses, industrial engineering and equipment
Metal and chemical industries, oil factories in Saudi Arabia, quality of petroleum production plants and equipment, large illuminated industrial facilities, oil and gas refinery, petrochemical projects contributing to the renaissance of the Saudi national economy
Fuel factories and mines in the Kingdom of Saudi Arabia, large and huge warehouses and tanks, towers and metal structures in desert lands, oil and gas refineries, petrochemical industries and projects, the concept of petroleum engineering in the Gulf countries, the renaissance of the Saudi national economy.
Steel Pipelines and Cables, Petrochemical Industries and Projects, Pollution from Oil Production, Oil and Gas Refinery in Industrial Area, Factories and Plants in Saudi Arabia, Large and Huge Warehouses, Industrial Engineering and Equipment
View of large and huge warehouses and tanks at sunset, the renaissance of the Saudi national economy, the concept of petroleum engineering in the Gulf countries, petrochemical industries and projects, gas refinery, oil factories and laboratories in the Kingdom of Saudi Arabia
Steel Pipes and Cables, Petrochemical Industries and Projects, Panoramic View of Oil and Gas Refinery in Industrial Area, Factories and Plants in Saudi Arabia, Industrial Engineering and Equipment, Large and Huge Warehouses
Large and huge warehouses, industrial engineering and equipment, petrochemical industries and projects, steel pipelines and cables, oil and gas refining plant in the industrial area, factories and plants in the Kingdom of Saudi Arabia
Factories and plants in Saudi Arabia, Oil and gas refinery in industrial area, Steel pipelines and cables, Petrochemical industries and projects, Pollution resulting from oil production, Huge and large warehouses, Industrial engineering and equipment
Petrochemical industries and projects, oil and gas refineries, the concept of petroleum engineering in the Gulf countries, the renaissance of the Saudi national economy, lighting towers and metal structures at sunset, large and huge warehouses and tanks, oil factories and laboratories in the Kingdom of Saudi Arabia
Illuminating metal towers and structures at night, the renaissance of the Saudi national economy, oil factories and plants in the Kingdom of Saudi Arabia, oil and gas refineries, the concept of petroleum engineering in the Gulf countries, large and huge warehouses and tanks, petrochemical industries and projects
Pipes and large equipment, the concept of work in the industrial engineering sector, oil refineries in the Kingdom of Saudi Arabia, the quality of machinery and equipment in oil extraction plants, the use of modern technologies in the production of oils and gas
Metal and chemical industries, oil factories in Saudi Arabia, quality of petroleum production plants and equipment, large illuminated industrial facilities, oil and gas refinery, petrochemical projects contributing to the renaissance of the Saudi national economy
Steel pipelines and cables, quality of petroleum production plants and equipment, large industrial facilities, petrochemical projects contributing to the renaissance of the Saudi national economy, oil factories in the Kingdom of Saudi Arabia, metals and chemicals industries
Saudi national economy renaissance, lighting towers and metal structures at sunset, oil factories and plants in Saudi Arabia, oil and gas refinery, petroleum engineering concept in Gulf countries, large and huge warehouses and tanks, petrochemical industries and projects
Professional photography of a crude oil plant in Saudi Arabia, highlighting industrial architecture, close-up of a modern and bright oil refinery, advanced technical equipment and tools, petrochemical industries and projects, large and huge warehouses, industrial engineering and equipment
Oil and gas refinery in industrial area, factories and plants in Saudi Arabia, huge and large warehouses, industrial engineering and equipment, petrochemical industries and projects, steel pipelines and cables
Giant industrial engineering and equipment, oil and gas refinery in industrial area, steel pipelines and cables, petrochemical industries and projects, large industrial complex with tall smoke chimneys in Saudi Arabia, huge and large warehouses
Petroleum engineering concept, oil and gas refinery, petrochemical industries and projects, renaissance of the Saudi national economy, oil factories in the Kingdom of Saudi Arabia, quality of machinery and equipment in factories that extract oil wealth from the depths of the seas
Industrial engineering and equipment, factories and plants in Saudi Arabia, oil and gas refining plant in the industrial area, steel pipelines and cables, petrochemical industries and projects, pollution resulting from oil production, large and huge warehouses
Fuel factories and mines in the Kingdom of Saudi Arabia, large and huge warehouses and tanks, towers and metal structures in desert lands, oil and gas refineries, petrochemical industries and projects, the concept of petroleum engineering in the Gulf countries, the renaissance of the Saudi national economy.
Quality of petroleum production plants and equipment, steel pipelines and cables, large industrial facilities, petrochemical projects contributing to the renaissance of the Saudi national economy, oil factories in the Kingdom, metal and chemical industries, lighting towers illuminating streets and roads in Saudi Arabia
Oil and gas refinery, petrochemical industries and projects, renaissance of the Saudi national economy, oil factories in the Kingdom of Saudi Arabia, the concept of petroleum engineering, quality of machinery and equipment in factories that extract oil wealth from the depths of the seas
Large and huge warehouses, industrial engineering and equipment, petrochemical industries and projects, steel pipelines and cables, oil and gas refining plant in the industrial area, factories and plants in the Kingdom of Saudi Arabia
Petrochemical industries and projects, the renaissance of the Saudi national economy, the quality of machinery and equipment in oil factories in the Kingdom of Saudi Arabia, oil extraction plants from the depths of the seas, the concept of petroleum engineering, oil and gas refinery
Renaissance of the Saudi national economy, lighting towers and metal structures at night, oil factories and laboratories in the Kingdom of Saudi Arabia, oil and gas refineries, the concept of petroleum engineering in the Gulf countries, large and huge warehouses and tanks, petrochemical industries and projects
Quality of petroleum production plants and equipment, large industrial facilities, oil and gas refinery, petrochemical projects contributing to the renaissance of the Saudi national economy, oil factories in the Kingdom of Saudi Arabia, metal and chemical industries
Pipes and large equipment, the concept of work in the industrial engineering sector, oil refineries in the Kingdom of Saudi Arabia, the quality of machinery and equipment in oil extraction plants, the use of modern technologies in the production of oils and gas
Renaissance of the Saudi national economy, oil and gas refineries, petrochemical industries and projects, the concept of petroleum engineering in the Gulf countries, metal towers and structures in desert lands.
Oil and gas refineries in the industrial zone in Saudi Arabia, Extracting underground resources from the sea, Petrochemical industries and projects in the Kingdom, Huge machines and heavy equipment used in oil exploration, Working in the field of petroleum engineering, Saudi economic growth and progress
Petrochemical projects contributing to the renaissance of the Saudi national economy, metal and chemical industries, oil factories in the Kingdom of Saudi Arabia, quality of oil production plants and equipment, large illuminated industrial facilities, oil and gas refinery
Engineering and urban development of oil refineries, oil refinery in the desert of Saudi Arabia, huge and modern tools and equipment, adoption of modern techniques and technology in oil and gas production, soft golden sand dunes
Oil and gas refineries, petrochemical industries and projects, the concept of petroleum engineering in the Gulf countries, the renaissance of the Saudi national economy, towers and metal structures in desert lands, large and huge warehouses and tanks, fuel factories and mines in the Kingdom of Saudi Arabia
Saudi National Economy Renaissance, Towers and Metal Structures in Desert Lands During the Day, Large and Huge Warehouses and Tanks, Petrochemical Industries and Projects, Petroleum Engineering Concept in Gulf Countries, Oil and Gas Refineries, Fuel Factories and Mines in Saudi Arabia
Pipelines and steel cables, the concept of gas production in Saudi Arabia, monitoring the workflow in factories, a close-up shot of a group of Saudi Gulf engineers working in an oil and gas refining plant, working in the field of petrochemical industries and projects.
Oil and gas refineries, petrochemical industries and projects, petroleum engineering concept, renaissance of the Saudi national economy, metal structures in desert lands, large and huge warehouses and tanks, fuel factories and mines in the Kingdom of Saudi Arabia
Steel Pipelines and Cables, Petrochemical Industries and Projects, Pollution from Oil Production, Oil and Gas Refinery in Industrial Area, Factories and Plants in Saudi Arabia, Large and Huge Warehouses, Industrial Engineering and Equipment
Steel Pipes and Cables, Oil and Gas Refinery Plant in Industrial Area, Factories and Plants in Saudi Arabia, Large and Huge Warehouses, Industrial Engineering and Equipment, Petrochemical Industries and Projects
View of factory smoke spreading in the air, oil and gas refining plant, petrochemical industrial projects, economic growth and progress, oil production in the Kingdom of Saudi Arabia
Oil refineries in Saudi Arabia, petrochemical projects contributing to the renaissance of the Saudi national economy, gas plants and refineries, the concept of petroleum engineering in the Gulf countries, towers and metal structures at sunset, large and huge warehouses and tanks
Oil and gas refineries, petrochemical industries and projects, the concept of petroleum engineering in the Gulf countries, the renaissance of the Saudi national economy, towers and metal structures in desert lands, large and huge warehouses and tanks, fuel factories and mines in the Kingdom of Saudi Arabia
Petrochemical industries and projects in the Kingdom, extracting underground resources from the sea, huge machines and heavy equipment used in oil exploration, work in the field of petroleum engineering, oil and gas refining factories in the industrial zone in Saudi Arabia, Saudi economic growth and progress
Lighting of towers and metal structures at night, large and huge warehouses and tanks, oil factories and plants in the Kingdom of Saudi Arabia, the concept of petroleum engineering in the Gulf countries, oil and gas refinery, petrochemical industries and projects, the renaissance of the Saudi national economy
Petrochemical industries and projects, the concept of petroleum engineering in the Gulf countries, oil and gas refineries, the renaissance of the Saudi national economy, the view of large and huge warehouses and tanks at sunset, oil factories and laboratories in the Kingdom of Saudi Arabia
Towers and metal structures in desert lands, oil and gas refineries, petrochemical industries and projects, the concept of petroleum engineering in the Gulf countries, the renaissance of the Saudi national economy, large and huge warehouses and tanks, fuel factories and mines in the Kingdom of Saudi Arabia
Petrochemical industries and projects, pollution resulting from oil production, steel pipelines and cables, oil and gas refinery in the industrial area, factories and plants in the Kingdom of Saudi Arabia, large and huge warehouses, industrial engineering and equipment
Oil and gas refinery, petrochemical industries and projects, the concept of petroleum engineering in the Gulf countries, the renaissance of the Saudi national economy, lighting towers and metal structures at sunset, large and huge warehouses and tanks, oil factories and laboratories in the Kingdom of Saudi Arabia
Top view of an oil refinery in the desert of Saudi Arabia, harsh and dry climate, huge and modern tools and equipment, adoption of modern techniques and technology in oil and gas production, soft golden sand dunes, engineering and urban development of oil refineries
Petrochemical industries and projects, an oil and gas platform for extracting oils, the renaissance of the Saudi national economy, an excavator performing exploration, the quality of machinery and equipment in factories that extract oil wealth from the depths of the sea, the concept of petroleum engineering
Extracting underground resources from the sea, oil and gas refineries in the industrial zone in Saudi Arabia, petrochemical industries and projects in the Kingdom, huge machines and heavy equipment used in oil exploration, working in the field of petroleum engineering, Saudi economic growth and progress
Petroleum engineering concept, oil and gas refinery, petrochemical industries and projects, renaissance of the Saudi national economy, oil factories in the Kingdom of Saudi Arabia, quality of machinery and equipment in factories that extract oil wealth from the depths of the seas
Industrial engineering and equipment, petrochemical industries and projects, steel pipelines and cables, oil and gas refining plant in the industrial area, large and huge warehouses, factories and plants in the Kingdom of Saudi Arabia
Lighting towers and metal structures at night, the renaissance of the Saudi national economy, oil factories and plants in the Kingdom of Saudi Arabia, oil and gas refinery, the concept of petroleum engineering in the Gulf countries, large and huge warehouses and tanks, petrochemical industries and projects
Petrochemical projects contributing to the renaissance of the Saudi national economy, oil factories and factories in the Kingdom of Saudi Arabia, gas refinery, the concept of petroleum engineering in the Gulf countries, lighting towers and metal structures at sunset, large and huge warehouses and tanks.
Fuel factories in the Kingdom of Saudi Arabia, large and huge warehouses and tanks, towers and metal structures in desert lands, oil and gas refineries, petrochemical industries and projects, the concept of petroleum engineering in the Gulf countries, the renaissance of the Saudi national economy
Oil factories and laboratories in the Kingdom of Saudi Arabia, oil and gas refineries, renaissance of the Saudi national economy, lighting towers and metal structures at night, the concept of petroleum engineering in the Gulf countries, large and huge warehouses and tanks, petrochemical industries and projects
Petrochemical industries and projects, the concept of petroleum engineering in the Gulf countries, the gas refinery, the renaissance of the Saudi national economy, the view of large and huge warehouses and tanks at sunset, oil factories and laboratories in the Kingdom of Saudi Arabia
Petrochemical projects contributing to the renaissance of the Saudi national economy, metal and chemical industries, oil factories in the Kingdom of Saudi Arabia, quality of oil production plants and equipment, large illuminated industrial facilities, oil and gas refinery
Towers and metal structures in desert lands, oil and gas refineries, petrochemical industries and projects, the concept of petroleum engineering in the Gulf countries, the renaissance of the Saudi national economy, large and huge warehouses and tanks, fuel factories and mines in the Kingdom of Saudi Arabia
Metal and chemical industries in the Kingdom of Saudi Arabia, quality of petroleum production plants and equipment, large industrial facilities, oil and gas refinery, petrochemical projects contributing to the renaissance of the Saudi national economy
Pipelines and steel cables, Petrochemical industries and projects, Oil and gas refinery in the industrial area, Factories and plants in the Kingdom of Saudi Arabia, Industrial engineering and equipment, Huge and large warehouses, View of smoke from large industrial facilities at sunset
Large industrial facilities, quality gas production plants and equipment, pipelines and steel cables, petrochemical projects contributing to the renaissance of the Saudi national economy, oil factories in the Kingdom of Saudi Arabia, metallurgy and chemical industries.
The concept of work in the industrial engineering sector, the quality of machines and equipment in oil extraction laboratories, modern technologies in oil and gas production, petroleum refining plants in the Kingdom of Saudi Arabia.
Oil and gas refineries, the renaissance of the Saudi national economy, petrochemical industries and projects, the concept of petroleum engineering in the Gulf countries, metal towers and structures in desert lands.