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Crested Pool hot spring in Upper Geyser Basin in Yellowstone National Park, USA Royalty Free Stock Photo

Yellowstone National Park, Crested Pool with Beehive Geyser erupting in the Background, Upper Geyser Basin, Wyoming, USA Royalty Free Stock Photo

Boiling Water in Crested Pool, Upper Geyser Basin, Yellowstone National Park, Wyoming Royalty Free Stock Photo

Yellowstone National Park, Grotto Geyser at Upper Geyser Basin, Wyoming, USA Royalty Free Stock Photo

Yellowstone National Park, Colorful Crested Pool, Upper Geyser Basin, Wyoming, USA

Yellowstone National Park, Giant Geyser and Mastiff Geyser at the Upper Geyser Basin, Wyoming, USA Royalty Free Stock Photo

Castle Geyser at Upper Geyser Basin, Yellowstone National Park, Wyoming Royalty Free Stock Photo

Yellowstone National Park, USA Royalty Free Stock Photo

The deep blue boiling water of Crested Pool is surrounded by a rim of geyserite that separates the hot spring from the slightly cooler water sustaining an orange mat of algae, Yellowstone National Park, Wyoming, USA.