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People watching Arak tree (Salvadora persica) at the foot of a fault in sandstone wall, Sharaan Nature Reserve, AlUla, Medina Province, Saudi Arabia
A dilapidated bridge along the Johnson Canyon Railroad, Kaibab National Forest of Arizona, USA
A narrow and overgrown section of the abandoned Johnson Canyon Railroad in the Kaibab National Forest of Arizona, USA
View of Johnson Canyon from the Johnson Canyon Railroad Grade, Kaibab National Forest of Arizona, USA
View from below the rim of the giant sinkhole known as Johnson Crater in the Kaibab National Forest near Ash Fork Arizona, USA
View from below the rim of the giant sinkhole known as Johnson Crater in the Kaibab National Forest near Ash Fork Arizona, USA
View from below the rim of the giant sinkhole known as Johnson Crater in the Kaibab National Forest near Ash Fork Arizona, USA
The giant sinkhole known as Johnson Crater in the Kaibab National Forest near Ash Fork Arizona, USA
Top view of the Stone Dam in the Kaibab National Forest, Arizona, USA
Sandstone rock tower beside a large dry salt lake in the Sharaan Nature Reserve, AlUla, Medina Province, Saudi Arabia
Mountainscape viewed from the top of Harrat volcanic plateau, AlUla, Medina Province, Saudi Arabia
Mountainscape viewed from the top of Harrat volcanic plateau, AlUla, Medina Province, Saudi Arabia
Mountainscape viewed from the top of Harrat volcanic plateau, AlUla, Medina Province, Saudi Arabia
Mountainscape viewed from the top of Harrat volcanic plateau, AlUla, Medina Province, Saudi Arabia
People at the Viewpoint on the Harrat volcanic plateau, AlUla, Medina Province, Saudi Arabia
Remarkable sandstone rock carved by erosion in the Ashar Valley, AlUla, Medina Province, Saudi Arabia
Remarkable sandstone rock carved by erosion in the Ashar Valley, AlUla, Medina Province, Saudi Arabia
Arrangement of shale stones in a circle, on the way down from Stokla pass (4900) to the village of Stok, Hemis National Park, Ladakh region, state of Jammu and Kashmir, India, Asia
Rumbak valley, Hemis National Park, Ladakh region, state of Jammu and Kashmir, India, Asia
Aerial view of the Rockies, United States of America
Remarkable sandstone rock carved by erosion in the Ashar Valley, AlUla, Medina Province, Saudi Arabia
Aerial view of the Site of Hegra (Madain Salih), UNESCO, in the area of AlUla, Medina Province, Saudi Arabia
Aerial view of red sandstone formation, in the area of AlUla, Medina Province, Saudi Arabia
Aerial view from an aircraft of the desert in AlUla region, Medina Province, Saudi Arabia
Aerial view from an aircraft of the desert in AlUla region, Medina Province, Saudi Arabia
Cullin Hills in winter, Isle of Skye, Scotland, UK
Avola lakes, high angle view, Avola, Noto Valley, Sicily, Italy
Mosteiros and coast, Sao Miguel, Azores Islands, Atlantic, Portugal
Adult rockhopper penguin (Eudyptes chrysocome chrysocome) at breeding and molting colony on New Island, Falkland Islands
View of the famous rock runs outside Stanley, the capital and only city in the Falkland Islands
Cotton Grass on Bera Mawr looking to Bera Bach, Carneddau Mountains, Snowdonia National Park (Eryri), North Wales, United Kingdom
Gorner Glacier on Monte Rosa massif, Zermatt, Canton Valais, Switzerland
Aerial of Ouara, former capital of the Ouaddai Empire, Chad
Rock formations in the oasis Tigui, Tibesti Mountains, Chad
Aerial of Ouara, former capital of the Ouaddai Empire, Chad
Rock formations in the oasis Tigui, Tibesti Mountains, Chad
Overflooded area after rainfall in the Tibesti Mountains, Chad
Aerial of the Trou du Natron volcanic crater and its natron lakes, Tibesti Mountains, Chad
Tousside volcano above Trou du Natron, Tibesti Mountains, Chad
Aerial of the Trou du Natron volcanic crater and its natron lakes, Tibesti Mountains, Chad
Aerial of the Trou du Natron volcanic crater and its natron lakes, Tibesti Mountains, Chad
Aerial of the Trou du Natron volcanic crater and its natron lakes, Tibesti Mountains, Chad
Aerial of the Trou du Natron volcanic crater and its natron lakes, Tibesti Mountains, Chad
Aerial over Trou du Natron with volcano Tousside in the background, Tibesti Mountains, Chad
Aerial over Trou du Natron with volcano Tousside in the background, Tibesti Mountains, Chad
Aerial of the Trou du Natron volcanic crater and its natron lakes, Tibesti Mountains, Chad
Aerial of the Trou du Natron volcanic crater and its natron lakes, Tibesti Mountains, Chad
Beautiful rock formations around Zouar, Tibesti Mountains, Chad
Aerial of the Trou du Natron volcanic crater and its natron lakes, Tibesti Mountains, Chad
Beautiful rock formations around Zouar, Tibesti Mountains, Chad
Beautiful rock formations around Zouar, Tibesti Mountains, Chad
Aerial of the rocky mountains around Zouar, Tibesti Mountains, Chad
Aerial of the rocky mountains around Zouar, Tibesti Mountains, Chad
Beautiful rock formations around Zouar, Tibesti Mountains, Chad
Aerial of beautiful rock formations around Zouar, Tibesti Mountains, Chad
Aerial of beautiful rock formations around Zouar, Tibesti Mountains, Chad
Aerial of the rocky mountains around Zouar, Tibesti Mountains, Chad
Aerial of beautiful rock formations around Zouar, Tibesti Mountains, Chad
Rocky mountain in Zouar, Tibesti Mountains, Chad
Aerial of beautiful rock formations at sunset around Zouar, Tibesti Mountains, Chad
Aerial of beautiful rock formations around Zouar, Tibesti Mountains, Chad
Aerial of beautiful rock formations around Zouar, Tibesti Mountains, Chad
Aerial of beautiful rock formations around Zouar, Tibesti Mountains, Chad
Aerial of beautiful rock formations around Zouar, Tibesti Mountains, Chad
Water hole in the sand dunes, Tibesti Mountains, Chad
Aerial of a beautiful sand dune in the Tibesti Mountains, Chad
Tank from the Libyan Chad war, Tibesti Mountains, Chad
Aerial of Abeche, Chad
Aerial of the Chari River, N'Djamena, capital of Chad
Aerial of N´Djamena, capital of Chad and the Chari River, Chad
Loop Drive, Three Sisters on left, Camel Butte on right, Monument Valley Navajo Tribal Park, Utah, United States of America
Three Sisters, Monument Valley Navajo Tribal Park, Utah, United States of America
Three Sisters, Monument Valley Navajo Tribal Park, Utah, United States of America
The Thumb, Monument Valley Navajo Tribal Park, Utah, United States of America
West Mitten Butte, Monument Valley Navajo Tribal Park, Utah, United States of America
West Mitten Butte, Monument Valley Navajo Tribal Park, Utah, United States of America
Evening Shadows, West Mitten Butte, Monument Valley Navajo Tribal Park, Utah, United States of America
Merrick Butte, Monument Valley Navajo Tribal Park, Utah, United States of America
Merrick Butte, Monument Valley Navajo Tribal Park, Utah, United States of America
West Mitten Butte, Monument Valley Navajo Tribal Park, Utah, United States of America
West Mitten Butte, Monument Valley Navajo Tribal Park, Utah, United States of America
Merrick Butte, Monument Valley Navajo Tribal Park, Utah, United States of America
John Ford's Point, Merrick Butte in background, Monument Valley Navajo Tribal Park, Utah, United States of America
Adult Dall sheep (Ovis dalli) in Denali National Park, Alaska, United States of America
View of the Polychrome Mountains from lookout point on the park road inside Denali National Park and Preserve, Alaska, United States of America
View of the Polychrome Mountains from lookout point on the park road inside Denali National Park and Preserve, Alaska, United States of America
Water melting from the Briksdalsbreen glacier south of the small town of Olden in coastal Norway, Vestland, Norway
View of the lake created by the historic Bainbridge Steel Dam near Ash Fork, Kaibab National Forest, Arizona, United States of America
A cattle pond (livestock tank), part frozen, Coconino National Forest, Apache Maid Mountain in the background, Arizona, United States of America
Canyon in Djebel Saghro, on the road from Ouarzazate to Agdz, Draa-Tafilet region, Morocco
Landscape viewed from Tizi'n-Tinififft mountain Pass, on the road from Ouarzazate to Agdz, Draa-Tafilet region, Morocco
Continental drift between North American and Eurasian tectonic plates, Thingvellir National Park, UNESCO, in winter, Western Region, Iceland
Continental drift between North American and Eurasian tectonic plates, Thingvellir National Park, UNESCO, in winter, Western Region, Iceland
Continental drift between North American and Eurasian tectonic plates, Thingvellir National Park, UNESCO, in winter, Western Region, Iceland
Fjadrargljufur Canyon, south Iceland
Kirkjufell mountain, Snaefellsnes Peninsula, Iceland
Volcanic cinder rim in Coconino National Forest, Arizona, USA
Basalt boulders and cliffs, Johnson Canyon east of Bainbridge Steel Dam Lake near Ash Fork, Kaibab National Forest, Arizona, United States of America
Basalt boulders and cliffs, Johnson Canyon east of Bainbridge Steel Dam Lake near Ash Fork, Kaibab National Forest, Arizona, United States of America
Dry waterfall cliffs, Johnson Canyon between Bainbridge Steel and Stone Dams near Ash Fork, Kaibab National Forest, Arizona, United States of America