Wyandotte Caves are a National Natural Landmark in O'Bannon Woods State Park, west of Corydon. The cave system is known for large passageways, big chambers, delicate formations, and a human history that goes back thousands of years.
Tours are the reason to come, and availability can change by season, weather, and conservation work. Pair it with nearby Squire Boone Caverns if you want to make a cave-focused day in southern Indiana.