Mammoth Cave National Park
National Park
Rolling hills, deep river valleys, and the world's longest known cave system.
No entrance fee listed
National park sites in Kentucky
9 sites run by the National Park Service, including 1 national park. Each page has today's hours, the entrance fee and directions.
National park in Kentucky
Every other site
National Historic Trails 2
National Historical Parks 2
National Monuments 2
National Battlefields 1
National River & Recreation Areas 1
Source: National Park Service data feed, checked September 24, 2026. Sites that cross a state line are listed in each state.