Our last big (unplanned!) stop was in St. Louis. I shouldn't say that it was completely unplanned. We wanted to stop and see the arch, eat some dinner, and get on the road again. However, the bus had other plans. We parked by the river where the bus refused to crank up again until the next day.
So, we ended up eating dinner and staying in a hotel. The next day we rode up the teeny tiny elevator pod to the top of the arch. Needless to say, the kids loved it. They kept screaming: "this thing is even bigger than the General Sherman (sequoia tree)!!!!!"