Mammoth Cave National Park

Kentucky

Lonely Planet's Best in Travel 2026

Shop

Get even more with a Lonely Planet guide.

Shop Book

Overview

Home to the longest cave system on earth, Mammoth Cave National Park has more than 400 miles of surveyed passageways. Mammoth is at least three times longer than any other known cave, with vast interior cathedrals, bottomless pits and strange, undulating rock formations. Guided tours delve into the spookily beautiful underworld.

Must-see attractions

Explore all

Plan with a local

Experience the real United States (USA)Let a local expert craft your dream trip.
Get started

in partnership with getyourguide

Book popular activities in Mammoth Cave National Park