Haha, nothing except the Pier. And that's only cuz I worked on the "Odyssey" and I know they have one in Chicago.
I actually had a planned trip to go to Chicago in December but plans fell through. I was gonna catch the Pats/Bears game wit my bro but things fell apart. Kinda glad I didn't spend money on that though. Maybe I'll try to hit it up in the summer. Catch a Sox game at "The Cell".
My advice would be to take the El if it's a nice day parking is a nightmare.