Went into the museum expecting cowboys and native Americans stuff, but was surprised to find that much of the fort museum and history also centers around WWII, as Fort Robinson was a large German POW facility. Also, a training facility for military horses and mules pre WWI days. If you have half a day, take a drive up highway 71 to Toadstool National Geologic Park. Its a bit off the beaten path (and about a ten mile drive up a gravel road), but worth the drive, just because it is so different than anything you expect to find in NE. There are no facilities there, other than an outhouse. There is a one mile hike and a three mile hike, which takes you to the site of the Hudson-Meng Bison Kill site (didn't go to that so don't know if its much). Apparently they killed bison in that area about 10,000 years ago.