Tim Fitzharris / Turret arch through north window arch, Arches National Park, Utah

Jeff Foott / North Window arch in winter, Arches National Park, Utah

Jeff Foott / North Window and South Window arches in winter, Arches National Park, Utah

Jeff Foott / Turret Arch and North Window Arch, Arches National Park, Utah

Ingo Arndt / Turret Arch as seen through the North Window Arch, Arches National Park, Colorado Plateau, Utah, USA, September 2010

Jouan Rius / Turret Arch and North Window, Arches National Park, Utah, USA November 2012

Kirkendall-Spring / Rock formation 'Turret Arch' as seen through 'North Window'. Arches National Park, Utah, October 2012.

Kirkendall-Spring / Rock arch formations 'North and South Window'. Arches National Park, Utah, October 2012.

Tom Vezo / Natural arch with river valley in the background, Canyon de Chelly National Monument, Arizona **Digital Composite**

Tom Vezo / Natural arch with river valley in the background, Canyon de Chelly National Monument, Arizona

Rob Tilley / Turret Arch viewed through North Window at dawn, Arches NP, Utah, USA, October 2009

Steven Kazlowski / The North Window, natural sandstone rock arch in Arches National Park, Utah, USA. February 2009.

David Noton / Window Arch, Arches National Park, Utah, USA

David Welling / Turret Arch as seen through Window Arch in winter, Arches National Park, Utah, USA

David Welling / Turret Arch as seen through Window Arch in winter, Arches National Park, Utah, USA

Tim Fitzharris / Arch Rock and moon, Valley of Fire State Park, Nevada

Tim Fitzharris / Teardrop Arch with buttes in distance, Monument Valley Navajo Tribal Park, Arizona

David Noton / Turret Arch seen through Window Arch, Arches National Park, Utah, USA, North America

Gavin Hellier / Tourists at North Window, Arches NP, Utah, USA

Jeff Foott / Large number of tourists on overcrowded hiking trail under North Window Arch, Arches National Park, Utah

Jeff Foott / North Window and Turret Arch in winter, Arches National Park, Utah

Jeff Foott / Full moon over the North Window arch, Arches National Park, Utah

Jeff Foott / North Window sandstone arch with tourist, Arches National Park, Utah

Jeff Foott / Tourists at arch, North Window Arch, Arches National Park, Utah

Ingo Arndt / Turret Arch as seen through the North Window Arch at sunrise, Arches National Park, Utah