Badlands National Park is located in South Dakota and is 26-28 million years old. It covers 244,000 acres and is divided into four sectors, hosting 37 mammal, 9 reptile, and 6 amphibian species. The park has a long history dating back over 11,000 years when Native American tribes like the Arikara lived in the area. Fossils of ancient mammals are commonly found in the park, telling the story of evolution. Popular activities include hiking ridge trails that can last up to five hours, viewing wildlife, learning about the area's history, and watching an informative movie at the visitor center.