We're travelling across the north of the States in September and will be in Ohio in mid september. Our next main point of interest is to get to the Badlands NP and Mount Rushmore etc but in between obviously we have to cover Indiana, Illinois and Iowa, but reading through our many guide books there doesnt appear to be a great deal to stop for or look at. Has anybody got any ideas for sights along this section? We're up for anything except commercialism and shopping!!!