Ingo Arndt / Burned trees in front of Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, Wyoming, USA, September 2011.
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Ingo Arndt / Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, Wyoming, USA, September 2011.
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Paul D Stewart / Aerial view of Grand Prismatic thermal spring in Yellowstone National Park, USA. The bright colours are natural, coming from thermophile bacteria in the water. People can be seen walking on the raised...
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Peter Cairns / Parched trees in front of Grand Prismatic Spring geothermal area, Yelowstone National Park, Wyoming, USA, September 2008
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Hermann Brehm / Grand Prismatic Spring in Midway Geyser Basin, Yellowstone NP, Wyoming, USA.
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Nick Garbutt / Steam rising from Grand Prismatic thermal pool in snow covered landscape. Midway Geyser Basin, Yellowstone National Park, USA. February 2019.
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Jeff Foott / Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, Wyoming
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Ingo Arndt / Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, Wyoming, USA, September 2011
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Ingo Arndt / Bacterial mats in Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, Wyoming, USA, September 2011.
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Ingo Arndt / Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, Wyoming, USA, September 2011.
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Ingo Arndt / Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, Wyoming, USA, September 2011.
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Ingo Arndt / Grand Prismatic Spring, edge of pool, Midway Geyser Basin, Yellowstone National Park, Wyoming, USA
