I know this is not a typical attraction, but....while on a family vacation in Chicago, we stayed around the Water Tower. My 18 year old son found the Bentley Gold Coast exotic car dealership at 834 N. Rush. He and I spent FOREVER there while he looked over all the cars inside and out. I had to take pictures of him beside most of them so he could send them to his friends. (Look at my new car, man...) The staff there didn't seem to mind as long as he didn't drool on the cars. He talked more about his 2 visits there than most of the "normal" Chicago attractions he visited. Go figure!!