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 Jefferson State Natural Area Trail, which ascends to the peak of the mountain and through each overlook, may be accessed at the first park gate across from the park office during inclement weather, though caution is advised. The following state parks are within of Mount Jefferson State Natural Area: Mount Jefferson State Natural Area Mount Jefferson State Natural Area is a North Carolina state park in Ashe County, North Carolina in the United States. Located near Jefferson, North Carolina, it includes the peak of Mount Jefferson, named for Thomas Jefferson and his father Peter, who owned land nearby and surveyed the North Carolina-Virginia border