I am taking a road trip at the end of March from Chicago to Pittsburgh. I have been doing some research but have not found any intriguing stops to see along the way and was wondering if anyone had any suggestions. I have been to Indiana Dunes but since that is so close to Chicago I am looking for some interesting stops/statues/whatever to see along the way a little further. We were planning on taking the I-80/90.

After seeing Pittsburgh we are planning on driving to see Falling Water and Kentuck Knob. We are stopping to see the waterfalls at Ohiopyle along the way but are wondering if there are some other sites we are missing.

I am travelling with my parents who are in their 60s and one cannot do that much physical activity.