Cave of the Mounds, a National Natural Landmark, is open year-round for guided tours of this beautiful natural limestone cave. Walking tours follow paved, lighted walkways on a stroll that is easy for all ages. Fill your pockets with treasure at the Gemstone Mine or discover unique natural items in the amazing Rock & Fossil Gift Shop. The Visitor Center offers a variety of educational displays about the area's natural and cultural history. Explore Rock, Rain, and Butterfly Gardens, interpretive trails, and picnic areas that provide visitors with an exceptional outdoor experience!