I agree with Monty 870, Carhenge is a very interesting place to visit if you are out in that area. It is definately different, but everyone in my group (ages 18 to 50) enjoyed themselves there-I mean, who wouldn't want to see a bunch of old cars set up like stonehenge

They also have a nice little gift shop there. Another fun thing to do is the Oregon Trail Wagon Train Dinner near Chimney Rock, where you get to ride in a covered wagon, eat a chuckwagon dinner and then sit around the campfire and sing songs. I would also stop at Lake McConaughy near Ogallala if you have time.