Mammoth Cave National Park

A national park and World Heritage Site protecting the world's longest known cave system, with a range of distinctive guided cave tours and nearby attractions like the National Corvette Museum.

Mammoth Cave National Park lies in south-central Kentucky, about 140 km (87 miles) from Louisville and 150 km (93 miles) from Nashville. It protects the longest known cave system in the world—more than 680 km (420 miles) of surveyed passages and still growing—and was inscribed as a UNESCO World Heritage Site in 1981. The cave formed in limestone capped by protective sandstone, so its passages are wide and dry; the main cave is known for vast domes, deep pits and historic remains, while dripstone formations are concentrated mainly around Frozen Niagara. The heart of a visit is a National Park Service guided cave tour: the classic Historic Tour, the short but rewarding Frozen Niagara Tour, the Domes and Dripstones Tour, the long Grand Avenue Tour, plus seasonal lantern tours and the crawling Wild Cave Tour. Nearly all must be booked in advance on recreation.gov. Above ground, trails lead to River Styx Spring and Cedar Sink, and in summer you can canoe the Green River. Outside the park, Cave City and Horse Cave offer Diamond Caverns, Hidden River Cave, Kentucky Down Under and Dinosaur World; about 45 km (28 miles) west, Bowling Green has the National Corvette Museum and Lost River Cave, which you can tour by boat. The cave stays around 12°C (54°F) year-round, so you can visit any time; bring a light jacket and non-slip shoes. April–October has the most tours, and summer weekends and holidays are busiest. Getting there: drive via I-65 to the Cave City or Park City exit; there is no public transportation. Plan on 1–2 days.

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