Santorini, Greece

Turquoise ice at Lake Baikal, by Alexey Trofimov

Kings Canyon National Park, California

A tree in Afghanistan

Guangxi Province, China

The Georgian Bay Grotto, Ontario, Canada

Geothermic pool in a remote Icelandic highland during the summer months

Lake Coleridge, New Zealand

Tufas at Lake Mono, California

Fanning Island, Kiribati

Eagle Lake, near Lake Tahoe, California

Aldeyjarfoss in Skjálfandafljót, Iceland

Canaima National Park, Angel Falls