Rock formations on a landscape, Wind River Canyon, Wyoming, USA

Low angle view of rock formations, Wyoming, USA

High angle view of rock formations on a landscape, Canyonlands National Park, Utah, USA

High angle view of a river passing through rock formations, Colorado River, Canyonlands National Park, Utah, USA

High angle view of rock formations on a landscape, Colorado River, Canyonlands National Park, Utah, USA

Low angle view of rock formations on a landscape, Canyonlands National Park, Utah, USA

Low angle view of rock formations, Escalante Canyon, Colorado, USA

Rock formations on a landscape, Wind River Canyon, Wyoming, USA

Low angle view of rock formations, Rock Hoodoo, Arches National Park, Utah, USA

Low angle view of rock formations on a landscape, Arches National Park, Utah, USA

Low angle view of rock formations on a landscape, Canyonlands National Park, Utah, USA

Trees on a cliff, Escalante Canyon, Colorado, USA

High angle view of rock formations, Afar Depression, Djibouti

Slot canyon, Lower Antelope Canyon, Antelope Canyon, Page, Arizona, USA

High angle view of rock formations on a landscape, Yosemite National Park, California, USA

Slot canyon, Lower Antelope Canyon, Antelope Canyon, Page, Arizona, USA

Panoramic view of a canyon, ALT 89, Le Fevre Canyon, Arizona, USA

Panoramic view of a coastline, Black's Beach, La Jolla, California, USA

High angle view of a hiker standing at the entrance of a cave, Indian Well Cave, Lava Beds National Monument, California, USA

USA, Arizona, Tucson, Saguaro National Park, Hohokam Petroglyph

High angle view of rock formations on a landscape, Red Rock Canyon, Wyoming, USA