Yellowstone
Established in 1872, Yellowstone National Park is America’s first national park. Yellowstone contains half of all the world’s known geothermal features and has the world’s largest concentration of geysers.
Clepsydra Geyser, Lower Geyser Basin, Yellowstone National Park, USA
Since the 1959 Hebgen earthquake Clepsydra erupts almost without pause.
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