Nature
Blue Star Spring is a hot spring in Yellowstone National Park’s Upper Geyser Basin, named for the distinctive star shape of its pool. Its water averages about 190.7 degrees Fahrenheit, making it one of the basin’s intensely heated thermal features. Though classified as a hot spring, it has rarely acted like a geyser, with its last recorded eruption occurring in 2002. The visible remains of a bison calf at the bottom of the pool, after the animal fell in, underscore both the beauty and the danger of Yellowstone’s geothermal landscape.
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Mammoth, Wyoming · United States
