Badlands National Park is in South Dakota. Its dramatic landscapes span layered rock formations, steep canyons and towering spires. Bison, bighorn sheep and prairie dogs inhabit its sprawling grasslands. The Badlands Loop Road (Highway 240) winds past scenic lookouts. Several trails begin near the Ben Reifel Visitor Center. The Fossil Exhibit Trail is a boardwalk with displays on fossils uncovered in the park.