Black hills? two days excluded driving I assume? not far to Yellow Stone. Can you plan more days?
OK, Badland National Park, Wind Cave or Jewel cave (you only need see one of them, they are same), of course Mt. Rushmore, Black hill gold mine (Do not forget put pin on map at visiting center, not many from China, a lot from JP), Casino (Oldest in US), Needle hill state park (not bad). Devils Tower (only 1-2 hours drive west).
SD US Airforce base (if you like, on I-90, They take
OK, Badland National Park, Wind Cave or Jewel cave (you only need see one of them, they are same), of course Mt. Rushmore, Black hill gold mine (Do not forget put pin on map at visiting center, not many from China, a lot from JP), Casino (Oldest in US), Needle hill state park (not bad). Devils Tower (only 1-2 hours drive west).
SD US Airforce base (if you like, on I-90, They take