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Mammoth Cave National Park, located in central Kentucky, is a U.S. national park that encompasses portions of Mammoth Cave, the world's longest cave system. The national park was established in 1941, and later became a Biosphere Reserve in 1990. Mammoth Cave has more than 390 miles of passageway. The cave is secured with layers of sandstone; one of them being the Big Cliffy Sandstone. Human beings have been believed to have lived in the caves as far back as 6,000 years ago. Remains and mummies of Native Americans have been found in the caves; some of the remains date back pre-Columbian. The caves are home to many species of bats, as well as other living creatures, including the endangered Kentucky cave shrimp, a rare albino type of shrimp. The Mammoth Cave National Park hosts many tours, and even has a tower that makes the caves easily accessible to visitors.

Mammoth Cave National Park Overview