Chocolate Hills, Bohol, Philippines

Jewel Cave, Augusta, WA, Australia

Erta Ale Range, Ethiopia

Orchid Island, Taiwan

Glen Canyon, Utah

Blyde River Canyon, South Africa

Tapuaetai

Spa Pool Karijini National Park, Australia

Sunset in Amay, Belgium

Cave pool, Santorini, Greece

The Canadian Rocky Mountains

Hamilton Pool, Texas

South-East Kazakhstan