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Template:POTD/2010-01-16

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Castle Geyser
Castle Geyser, a cone geyser in the Upper Geyser Basin of Yellowstone National Park, located in the U.S. states of Wyoming and Montana. It has a 10–12 hour eruption cycle, consisting of hot water spewing up to a height of 90 feet (27 m) for about twenty minutes, followed by a noisy steam phase (shown here) for 30–40 minutes.Photo credit: Mila Zinkova