Natural Features & Ecosystems

Nature and Science
The interface between the sunlit and nether worlds
Mammoth Cave, by far the world's longest known cave system, is the heart of the South-Central Kentucky karst, an integrated set of subterranean drainage basins covering more than 1,050 square kilometers – 400 square miles. Atop this labyrinth is a biologically diverse set of ecosystems inextricably interlinked with the ecosystems underground. This physiographic province, with Mammoth Cave National Park at its core, was declared an International Biosphere Reserve in 1990.

Contact the Park

Mailing Address:

P.O. Box 7
Mammoth Cave, KY 42259-0007


(270) 758-2180
General information line for Mammoth Cave National Park

Contact Us