National Parks
- Badlands National Park
- In Badlands National Park, grassland suddenly turns into inhospitable cliffs and ridges with almost no plant cover to speak of.
- Wind Cave National Park
- Wind Cave - the first cave to be designated "national park", and the 7th such park to be created in the United States - is probably most famous for the calcite formation known as boxwork that lines the top of some of the caves, in a very peculiar way. 120 miles of passageways have been explored, making this the fourth-longest cave in the world.
[Top]National Memorial
- Mount Rushmore National Memorial
- The faces of four American presidents have been carved into Mount Rushmore inbetween 1927 and 1941: George Washington, Thomas Jefferson, Theodore Roosevelt and Abraham Lincoln under the supervision of the sculptor Gutzon Borglum. Each face is about 60 feet (18m) high.
[Top]National Monument
- Jewel Cave National Monument
- Jewel Cave is said to be the second longest in the world, with more than 135 miles surveyed. It features stalactites, stalagmites, draperies, frostwork, flowstone, boxwork and hydromagnesite balloons.
