Yellowstone National Park guide

Waterfalls, bison, and geysers: plan the ultimate trip through Montana and Wyoming

Top wow spots of Yellowstone

Waterfalls, bison, lakes, rivers, mountains, and geysers: this behemoth national park stretches through Montana, Idaho, and Wyoming

castle geyser, upper geyser basin
Courtesy of Xanterra Parks and Resorts

Castle Geyser

One of the oldest hydrothermal features in the park, Castle Geyser's eruptions are a sensational experience in sight and sound―with a cone reaching up to 90 feet, it sounds like an oncoming steam train.

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