August 25, 2015

Great Fountain Geyser, Yellowstone National Park

Photograph by Michael Melford, National Geographic

Great Fountain Geyser in Yellowstone National Park erupts every 9 to 15 hours, shooting water up to 220 feet high. Though Yellowstone was named a national park in 1872 (the nation's first, in fact), the National Park Service wasn't born until August 25, 1916—99 years ago today.

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