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Castle Geyser

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Even though this cannon of shooting water is quite majestic, it doesn't really resemble a castle now. When it was first discovered, its rims resembled castle battlements, and thus was given the moniker "Castle Geyser." Mineral deposits and errosive water eruptions have changed the shape over time. In any case, it is a must-see stop at the world-famous Yellowstone National Park.