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GEYSER HALL OF FAME
The "Old," the "Tall," and the "Best All Around"

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The Tall & Predictable
Grand Geyser, located in the Upper Geyser Basin, erupts every 7-15 hours, making it the tallest predictable geyser in the world. Grand erupts from a large pool with powerful spouts, sometimes reaching 200 feet (60 m). (More on Grand Geyser.)

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