Hot waterfalls in the runoff channels of Excelsior Geyser into the Firehole River in Yellowstone National Park, Wyoming, USAYellowstone National Park was founded on March 1, 1872, and is considered th
Hot water cascading through the runoff channels of Excelsior Geyser into the Firehole River — a detail most visitors walk past on the way to Grand Prismatic Spring without stopping to notice. © Dietmar Rabich, CC BY-SA 4.0, via Wikimedia Commons

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