hehe, come visit me
Actually, being from around Chicago and living here now, I haven't the slightest idea where one would be interested in going when they visit...much like when I was in Vienna the people I stayed with there really had no idea generally speaking what to show me.
All the recommendations here are great. I hear the restaurant at the top of the Hancock actually has a buffet lunch or something like that. Supposed to be pretty good. There are a TON of museums. Besides the ones mentioned, there's also a cool museum of contemporary art, etc. Definitely gotta take a look at the water tower - one of two surviving structures from the Chicago fire. The other is a nearby firehouse.