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 Pilchuck State Park Mount Pilchuck State Park Mount Pilchuck State Park is a public recreation area located east of Granite Falls, Washington, on the western edges of the Cascade Mountains. The state park features of alpine scenery, recreational activities, and Mount Pilchuck itself. The main point of interest is the trail to the peak and the old fire lookout located on the summit, above sea level. The name "Pilchuck" originated from the Native American name of "red water" for a creek in the area. The U.S. Forest Service built a fire lookout on the summit in 1918 which was staffed until the 1960s.