Clepsydra Geyser (Lower Geyser Basin) in the Yellowstone National Park, Wyoming, USAYellowstone National Park was founded on March 1, 1872, and is considered the world’s first national park. It is loc
Clepsydra Geyser erupting nearly continuously in the Lower Geyser Basin. Unlike Old Faithful's scheduled performances, Clepsydra goes off so frequently it barely pauses — a nice contrast for families who've been watching the countdown board. © Dietmar Rabich, CC BY-SA 4.0, via Wikimedia Commons

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