Castle Geyser
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In 1870, when members of the Washburn Expedition happened upon this Yellowstone geyser, they noted that the shape and structure of the crater resembled a castle’s tower. Since then, much of that stoic tower has gradually dissolved and eroded, although a 90‐foot-high (27-meter-high) column of boiling water still erupts with regular frequency.
Yellowstone National Park, Wyoming