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
Virginia State Route 263 Virginia State Route 263 State Route 263 (SR 263) is a primary state highway in the U.S. state of Virginia. Known as Orkney Grade, the state highway runs from SR 659 in Orkney Springs east to U.S. Route 11 (US 11) in Mount Jackson. SR 263 connects Mount Jackson with a resort area in the mountains of southwestern Shenandoah County. SR 263 is a Virginia Byway. SR 263 begins at the eastern end of Shrine Mont Circle, a loop that is designated SR 659 and serves Shrine Mont, an Episcopal Diocese of Virginia retreat that hosts the annual Shenandoah Valley