Shawnee Cave in Spring Mill State Park, Indiana, is also known as Donaldson Cave or the Donaldson-Bronson Cave and forms part of the Donaldson Cave System, a designated National Natural Landmark. It is the last of three connected underground passages stretching a little more than 8,000 feet along a stream that begins southeast of the park and runs through Twin Caves and Bronson Cave. Shawnee Cave may be entered through the Bronson Cave entrance and exited through the Donaldson entrance, but the Twin Caves to Bronson connection is considered extremely dangerous and remains closed. Access is controlled by the Indiana Department of Natural Resources, and visits are arranged through the Indiana Karst Conservancy.