Wooden boardwalk over the mineral sinter formations on Geyser Hill, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Travertine terrace formations, UNESCO World Heritage Site, Pamukkale, Denizli Province, Aegean Region, Turkey, Asia

Mammoth Hot Springs, Yellowstone Nationalpark, Wyoming, USA, United States of America

Mammoth Hot Springs, Yellowstone National Park, Wyoming, USA, United States of America

Mammoth Hot Springs, Yellowstone Nationalpark, Wyoming, USA, Vereinigte Staaten von Amerika