Fort Bourtange fort in, Bourtange, Groningen, Netherlands

The Wave. Coyote Buttes, Arizona

Hokitika Gorge, West Coast, New Zealand

Drakensberg, South Africa

Northern Lights over Tallinn

Yellow Creek Cliff

North Antarctica

Soufrière, St. Lucia, The Caribbean

Kings Canyon National Park, California

Erosion on the slopes of a volcano near Ankisabe, Madagascar

Aspen, Colorado

Hidden Beach on Marieta Islands, off the coast of Puerto Vallarta, Mexico

Opal Creek, Oregon