Mammoth Cave National Park
Kentucky

Kentucky

The world's longest known cave system lies beneath the rolling hills of southcentral Kentucky, with more than 400 miles of surveyed passageways. Guided tours lead into the underground chambers, home to about 130 forms of life, many of them specialized cave dwellers. Above ground, over 80 miles of trails wind through forests, and the Green and Nolin Rivers offer paddling and fishing. The Mammoth Cave Visitor Center is the place to book tour tickets and plan a trip. Thousands of years of human history are woven into the landscape, from early exploration to historic churches and cemeteries. The park is a UNESCO World Heritage Site and the core of an International Biosphere Reserve.
Visitor Centers
Campgrounds
Camping guide →About the Park
Park Guides
All 11 guides →Summer or Winter: Touring a 54°F Cave
Inside Mammoth Cave, the air holds a steady 54 degrees all year long, so the temperature underground in July matches January.
Mammoth Cave Tours: From Easy Walks to Crawls
Ranger-led cave tours are the only way to see the underground side of Mammoth Cave, the world's longest known cave system, with more than 400 miles explored so far.
420 Miles and Counting: Mapping the Longest Cave
Beneath Mammoth Cave National Park lies the largest cave system on Earth, and no other known cave is even half its length.
Paddling the Green River National Water Trail
Visitors can paddle more than 30 miles of the Green and Nolin Rivers as they wind through the park.
Karst Country: Sinkholes, Springs and Carbonic Acid
Mammoth Cave sits in a landscape of eroded limestone known as karst topography. The Mammoth Cave area is a classic example of this kind of terrain.




