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Old Faithful, Yellowstone National Park |
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| Although not the largest geyser in the park, Old Faithful in Yellowstone National Park is the most well-known. The geyser erupts at 30- to 90-minute intervals, depending on the length of the previous eruption. | ||||||
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| Robert Franz/Corbis | ||||||
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| Appears in these articles: | ||||||
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| Yellowstone National Park; Geyser; Camping; Wyoming (state); National Parks and Preserves | ||||||
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