Water and sand mix to create ocean rainbow

Bell Rock in Sedona, Arizona

Five dead trees in front of a massive sanddune

Abruzzo National Park, Italy

Sunrise over Dolly Sods, West Virginia

The sky in the ground. Yellowstone National Park

Darvaza gas crater, Turkmenistan

Azores, Portugal

St. Thomas, U.S. Virgin Islands

Jay Cooke National Park, MN

Saar River, Germany

Morondova, Madagascar

Mackenzie Basin, New Zealand