Drone view of Kok-Moinok Canyon, a clay-sand structure formed on the slopes of arid mountains cut by water streams, Kyrgyzstan, Central Asia, Asia

A birdseye view of Svinafellsjokull Glacier, in southern Iceland, Polar Regions

Interesting lenticular cloud formations forming over the island of South Georgia in the Southern Ocean

Canyon with sandstone walls in the Sharaan Nature Reserve, AlUla, Medina Province, Saudi Arabia

Large dry salt lake in the Sharaan Nature Reserve, AlUla, Medina Province, Saudi Arabia

People at the Viewpoint on the Harrat volcanic plateau, AlUla, Medina Province, Saudi Arabia

Aerial view of the Site of Hegra (Madain Salih), UNESCO, in the area of AlUla, Medina Province, Saudi Arabia

Tigui, Tibesti Mountains, Chad

Aerial of the Trou du Natron volcanic crater and its natron lakes, Tibesti Mountains, Chad

Aerial of the rocky mountains around Zouar, Tibesti Mountains, Chad

Glacial iceberg detail from ice calved off the Sawyer Glacier in Tracy Arm, Southeast Alaska, United States of America

West Mitten Butte, Monument Valley Navajo Tribal Park, Utah, United States of America

Aerial over Trou du Natron with volcano Tousside in the background, Tibesti Mountains, Chad

Last light on mesas, West Mitten Butte, East Mitten Butte, Merrick Butte, Scenic Drive, sunset, dusk, Monument Valley, Navajo Tribal Park, Navajo Nation Reservation, Arizona, Utah, United States of America, USA

Rock formation in Arizona desert

Conservation sign in Arizona desert

Coal fired steam plant

High angle view of Arizona desert

Coal fired steam plant

Sandstone cliffs

Rock formation in Arizona desert

Sandstone

Tourist in front of butte in Arizona desert

High angle view of Arizona

Colorado mountains

Aerial view of Colorado desert

Aerial view of snow covered desert

High angle view of Arizona desert

Colorado mountains