Grand Prismatic Spring, Yellowstone National Park (Wyoming, USA)


The Grand Prismatic Spring is the largest hot spring in the United States, and the third largest in the world. The vivid colors in the spring are the result of pigmented bacteria in the microbial mats that grow around the edges of the mineral-rich water. The bacteria produce colors ranging from green to red.

Website: http://www.nps.gov/yell

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