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

Perpetual Spouters Intermittent Springs Cone vs Fountain Aging a Geyser How Geysers Change Geyser Hall of Fame

The Old
The mammoth cone of Castle Geyser indicates that it is very old. Castle may even be the oldest geyser in Yellowstone. (More on Castle.)

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