Mammoth Cave National Park, known for its vast underground cave system, is located in Kentucky.

Mammoth Cave National Park is located in central Kentucky and is home to the longest-known cave system in the world. With over 400 miles of surveyed passageways, the park offers a fascinating underground experience for visitors. The cave system has been shaped over millions of years by the flow of water through limestone, creating an impressive array of stalactites, stalagmites, and other geological formations. The park is also a UNESCO World Heritage Site, recognized for its natural beauty and its significance in the study of geology and karst landscapes. Mammoth Cave is a popular destination for spelunking, hiking, and wildlife observation.