Wind Cave National Park
near Hot Springs, SD

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Wind Cave Natural Entrance: This small hole marks the site of the original cave opening discovered by Tom Bingham in 1881. A whistling sound and waving grasses and bushes nearby attracted his attention as he passed by.

Changing atmospheric pressure outside the cave causes the air inside the cave to adjust. When pressure outside the cave rises, the air outside enters the cave through any openings: when the pressure outside the cave falls, air leaves the cave. Cave air adjusting to the outside pressure causes the wind for which the cave was named















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