Mammoth Cave System

The Mammoth Cave System is located primarily in Edmonson County, south-central Kentucky. It was formed over millions of years by the dissolving of limestone bedrock characteristic of the region's karst topography. It is preserved as the core of Mammoth Cave National Park.

Mammoth Cave is the world's longest known cave network, spanning more than 400 miles of surveyed passageways. Geologists and explorers continue to discover and map new connections, meaning the official length constantly increases. It easily surpasses the second-longest cave system in the world by a massive margin.

Yes, the public can take guided tours through various sections of the Mammoth Cave System via the National Park Service. Tours range from easy, paved historical walks to physically demanding, wild caving experiences that require crawling. Due to the fragile ecosystem and complex geography, independent exploration of the deeper caves is strictly prohibited.

Yes, Mammoth Cave was designated as a UNESCO World Heritage site in 1981 due to its immense geological significance. It is also recognized as an International Biosphere Reserve because it contains a highly unique and fragile underground ecosystem. The cave system houses over 130 species of wildlife, including endangered blind cave fish.