The surface of Mammoth Cave National Park encompasses ... or a walk on the River Styx Spring Trail. The least arduous cave tour (0.25 mile, 75 minutes) is the Frozen Niagara Tour.

Join us as we take a historic tour of Mammoth Cave in Kentucky, the longest cave system in the world! Experience the breathtaking underground world firsthand. #MammothCave #KentuckyCaves #HistoricTour ...

BOWLING GREEN, Ky. (WBKO) - 100 years ago, Mammoth Cave became home to one of the hottest stories of the time. The story of ...