The highlight of this 200-acre park is the 3/4-mile cavern formed of alabaster, a rare form of gypsum, making it the largest natural gypsum cave in the world open to the public. Daily guided tours of the cave are available on the hour from 9am to 4pm (fee charged). The cavern recently underwent an extensive lighting overhaul. Group tour reservations are required at least two weeks in advance. A horseshoe pit, volleyball court, camping areas, picnic tables and shelters, group shelters with electricity, water and grills are available at the park. Wild caving is a unique adventure at the park as well.