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It is located in Yellowstone National Park, the first established US National Park.

Old Faithful is a cone geyser located in Wyoming, in Yellowstone National Park in the United States. Old Faithful was named in 1870 during the Washburn-Langford-Doane Expedition and was the first geyser in the park to receive a name. It is also called the most predictable geographical feature on Earth, erupting about every 85 to 105 minutes (partly dependent on ground water temperature)..

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7y ago

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