Rushmore Cave into a rock known as limestone. The cave has a cornucopia of rooms including the Entrance Room, Post Office, Image Room, Big Room, Fairyland, Rope Room, Geode Room, The Rouge Room (Party Room), Arrowhead Room, and the Floral Room. The cave also includes boxwork and many dripstone formations including stalactites, stalagmites, columns, helictites and flowstone. Rushmore Cave Rushmore Cave is the closest show cave to Mount Rushmore National Memorial in the United States. It contains a wide variety of natural formations. It is the ninth longest cave in South Dakota. It measures a distance of . It was discovered in
Mount Washington State Forest Mount Washington State Forest Mount Washington State Forest is a publicly owned forest with recreational and scenic features covering in the town of Mount Washington, Massachusetts. The forest conjoins with New York state and the state of Connecticut in the southern Taconic Mountains of the southwestern Berkshire region of Massachusetts. Bash Bish Falls State Park lies adjacent to the state forest. The forest is managed by the Massachusetts Department of Conservation and Recreation. The forest was acquired by the state through gifts of Alfred F. Intemann (1897-1986) and his wife Cornelia Van der Smissen Intemann (who died in 1963) conveyed