I'll be driving through Nebraska next week on I-80, and I'm trying to figure out some good places to stop along the way. Do you have any suggestions? I won't have time to go too far off the highway - maybe about 20-30 minutes per stop. Anything scenic or nature-related would be good, or any good photo opportunities would be good, too. Also, are there any good Sand Hills spots in that area, maybe near North Platte or Ogallala?