Why is Mammoth Cave a site of international importance?

Ecological importance: The system contains approximately 130 animal species with 12 endangered or threatened species. There are about 19 rare or threatened plant species, including over 10 threatened or endangered bat species.

Geological importance: Mammoth Cave is one of the world’s longest cave systems. It is a world-class example of karst topography and a repository for scientific information in karst geology, hydrology, biology, ecology, climatology, and paleontology.

Historical and cultural importance: The cave system has had historic significance for over ten thousand years. It provided protection for prehistoric inhabitants, saltpeter during the War of 1812, and refuge during the Civil War; was used as a tourist destination in the 19th and early 20th century; and contains prehistoric and historic remains.

International recognition: Mammoth Cave is designated a World Heritage Site, an International Biosphere Reserve, and a Wetland of International Importance.