South Dakota is famous for it's state parks such as Badlands National Park, featuring a highly eroded, brightly-colored landscape surrounded by semi-arid grasslands. Wind Cave National Park, established in 1903 in the Black Hills, contains an extensive cave network as well as a large herd of bison. Mount Rushmore National Memorial in the Black Hills features a mountain carved to resemble four former U.S. presidents and other areas managed by the National Park Service include Jewel Cave National Monument near Custer, the Lewis and Clark National Historic Trail, the Minuteman Missile National Historic Site, which features a decommissioned nuclear missile silo, and the Missouri National Recreational River.
