There’s more to scenic southern Indiana than what initially meets the eye—just below the land’s surface lies a network of caves containing Ice Age bones, underground streams, and fascinating biodiversity. Experience it for yourself on tours of the caves listed below. Tours are guided and the caves are easy to traverse (with steps), so all you need are comfortable shoes and a light jacket. The caves remain around 54 degrees year-round, making them a perfect activity for summer and winter alike.