
South Dakota Is Home to Two of the World’s Biggest Ones of These

South Dakota Is Home to Two of the World’s Biggest Caves
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When you're looking for some of the biggest ones of these on the planet, look no further than South Dakota.
You'll find them right under your nose.

At 180 miles, Jewel Cave is the second-longest cave in America and the third-longest in the world.
The cave, which is about 13 west of Custer in the Black Hills, was discovered by a pair of local prospectors in 1900 and became a national monument in 1908.
Just a short drive away is the country's third-longest and world's sixth-longest cave.
Wind Cave checks in with 143 miles of explored cave passageways. It is also home to about 95 percent of the world's discovered box work formations.
The National Park, about 10 miles north of Hot Springs, was established in 1903 by President Theodore Roosevelt, becoming the first cave to be designated a national park anywhere in the world.
South Dakota's pair of caves on the list is matched by the state of Kentucky and the country of Mexico.
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