Fumarole
A fumarole is a volcanic gas and steam vent which sometimes emit a loud roar. This fumarole is in the side of Roaring Mountain in Yellowstone National Park. And...
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A fumarole is a volcanic gas and steam vent which sometimes emit a loud roar. This fumarole is in the side of Roaring Mountain in Yellowstone National Park. And, yes, they make an eerie sound.
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