Few natural formations are as awe-inspiring or intriguing as a cave. The deep, dark recesses immediately conjure up images of adventure and mystery. At Cave-In-Rock in southern Illinois, atop the high bluffs overlooking the scenic Ohio River, the heavily wooded park is named for the 55-foot-wide cave that was carved out of the limestone rock by water thousands of years ago. Explore all that Southernmost Illinois has to offer! Visit southernmostillinois.com/ to plan your next trip. #ExploreSI