U.S. national parks, state parks, national monuments and wilderness areas — travel guides, trails, camping and things to do.

Kentucky National Parks

The state of Kentucky has just one national park:

Mammoth Cave National Park Mammoth Cave National Park is mostly underground, with over 367 miles explored and mapped. Mammoth Cave is the world’s longest known cave. In fact it is so long that if the second and third longest caves in the world were joined together, Mammoth Cave would still be the planet’s longest cave and have nearly 100 miles left over! Native Americans of the Early Woodland period gathered minerals from Mammoth Cave between 2,000 and 4,000 years ago. Objects they left behind, such as slippers, cane torches, gourds, and mussel shells, remain perfectly preserved in the cave. Mammoth Cave National Park preserves the cave system and a part of the Green River valley and hilly country of south central Kentucky.