USA, Arizona, Grand Canyon, Aerial view of the western Grand Canyon.

USA, Arizona, Grand Canyon, Tepee below Spirit Mountain.

USA, Arizona, Grand Canyon, Tepee below Spirit Mountain.

USA, Arizona, Grand Canyon, Campfire below Spirit Mountain.

USA, Nevada, Hoover Dam, View of towers at Hoover Dam.

USA, Nevada, Hoover Dam, View of towers at Hoover Dam.

USA, California, Yosemite, View of mountains from Merced River.

USA, California, Yosemite, View of mountains from Merced River.

USA, California, Yosemite, View of mountains from Merced River.

USA, California, Yosemite, Tunnel View from Inspiration Point.

USA, California, Yosemite, Tunnel View from Inspiration Point.

Scotland, Highlands, Coigach, Drumrunie Forest. Twin peaks of Culmor at 849 metres with the upper reaches covered in snow. View from Knockan Crag.