I'm driving cross country with a friend from Portland to DC to go back to school in the Fall. I'm planning on leaving late July to make it back by early August. I want to take about a week and a half to do it that way I can see some sights instead of driving the whole time. Any suggestions on things that we must see on the way? We're probably going to be going through Idaho, Wyoming, Nebraska, Missouri, Illinois, Kentucky, West Virginia and then Virginia. Any help would be greatly appreciated!