This 100-acre underground attraction in Louisville, Kentucky, is home to the world’s only fully underground zip line and aerial ropes courses.
This U.S. National Landmark in Marengo, Indiana, offers two walking routes: the 1/3-mile Crystal Palace and the one-mile Dripstone Trail.
Explore a beautiful and intricate cave system that leads 140 feet below the surface in Sweetwater, Tennessee.
Head to Mammoth Cave, Kentucky, to explore the world’s longest known cave system, with over 400 documented miles of tunnels and passageways.
Get a family-friendly taste of the outlaw life by riding horses on guided tours and exploring caverns in Cave City, Kentucky.