Calcium carbonate formation at a hot spring, Mammoth Hot Springs, Yellowstone National Park, Wyoming, USA

High angle view of a natural geyser, Old Faithful, Upper Geyser Basin, Yellowstone National Park, Wyoming, USA

Rippled pattern on a water surface, Grand Prismatic Spring, Yellowstone National Park, Wyoming, USA

High angle view of a natural geyser, Old Faithful, Upper Geyser Basin, Yellowstone National Park, Wyoming, USA

Terraces at a hot spring, Mammoth Hot Springs, Yellowstone National Park, Wyoming, USA

Reflection of palm trees in water, Pu'uhonua o Honaunau National Historical Park, Big Island, Hawaii Islands, USA

Bus on the road, Yellowstone Lake, Yellowstone National Park, Wyoming, USA

Panoramic view of a landscape with a natural geyser in the background, Old Faithful, Upper Geyser Basin, Yellowstone National Park, Wyoming, USA

Close-up of a man, Yellowstone Lake, Yellowstone National Park, Wyoming, USA

Rock formations on a landscape, Grand Canyon, Grand Canyon National Park, Arizona, USA

Silhouette of a man with his arms outstretched, Grand Prismatic Spring, Yellowstone National park, Wyoming, USA

Side profile of a man sitting on a pier at a hot spring, Grand Prismatic Spring, Yellowstone National Park, Wyoming, USA

High angle view of a trail, Yellowstone National Park, Wyoming, USA