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
Rushmore Memorial Library Rushmore Memorial Library The Rushmore Memorial Library, also known as the Rushmore Memorial Building, is located at the junction of NY 32 and Weygant Hill Road in Highland Mills, New York, United States. It is a small Arts and Crafts-style stone building constructed in the 1920s with a donation from Charles E. Rushmore, a local resident for whom Mount Rushmore is also named. It served as the Town of Woodbury public library until the mid-1980s, when a larger modern library was built. Today it is the headquarters of the town historical society. It was listed on the National Register of