Indian Cave State Park covers 3,052 acres of hardwood forest along the Missouri River. Its namesake is a large sandstone cave with prehistoric Native American petroglyphs, viewable from an ADA-accessible boardwalk. The park has 22 miles of hiking trails, 16 miles of equestrian trails, biking, fishing, boating from a concrete boat ramp, archery, disc golf, and hunting, with Adirondack shelters along the trails. Events include Outdoor Adventure in April, Christmas in July, and Haunted Hollow in October. Historic Brownville, with museums, galleries, and shops, is nearby. Ash Grove has 51 Electric Plus and 36 Electric sites, and Hackberry Hollow has 32 Electric Plus and 15 Electric sites. Basic sites are open year-round, equestrian camping has 12 corrals, and cabin, lodge room, and group lodge reservations are available. Showers, laundry, and a dump station are provided.