Meramec State Park

Meramec State Park is a public recreation area located near Sullivan, Missouri, about 60 miles from St. Louis, along the Meramec River. The park has diverse ecosystems such as hardwood forests and glades. There are over 40 caves located throughout the park, the bedrock is dolomite. The most famous is Fisher Cave, located near the campgrounds. The park borders the Meramec Conservation Area.

Cave data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).