1. Badlands National Park
2. Jewel Cave National Monument
3. Mount Rushmore
4. Custer State Park
5. Crazy Horse Memorial
A nice pass through or stop for a meal in the small town of Sioux Falls and be sure to visit its waterfall.
Worth a stop along your drive to/from Mount Rushmore. Parts of the building are actually made of corn! Not the structural parts of course. The murals on the outside and inside of this center are impressively designed out of different colors of corn.
Wall Drug Store
Another stop on your road trip, this famous drug store is pretty big and has all kinds of things including Western clothing, drugs (not the illegal kind), outdoor items, and a cafe. Good place to stop, stretch your legs, maybe have a burger.
Hideout of the legendary bandits Frank and Jesse James.
Home to Wild Bill Hickock and basis for the show Deadwood. Small, quaint town worth driving through if it's on your way.