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Description: The Dragon's Mouth is a hot spring/cave in the Mud Volcano area of Yellowstone National Park.The sounds coming from the cave really did sound like a dragon breathing.Combine that with the boiling water and steam, and it's a pretty cool effect.The sounds are actually caused by boiling water crashing against the unseen walls of the cavern's depths.The cave was reportedly named in the early 1900s by a park visitor, when the water erupting from the opening was significantly more violent.Th
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