Danxia landform, Zhangye, China

Socotra Dragon Trees, Socotra archipelago

Northern Wales

Maroon Lake, Aspen, Colorado

K2 mountain, Pakistan.

Hole in the Wall, South Africa

Northern Lights over Tallinn

Cloudy water streaming down a valley of granite in Fitz Roy mountain

The River Drina from the Tara Mountain, Serbia

Iliamna Volcano, Alaska. Photo by Michael Melford

Upper Trail Lake in Moose Pass, Alaska

Beach in Perú, March, 2013

Monument Valley, Navajo Tribal Park, Arizona