Place to take an out of towner

We have some friends visiting soon, they have not been to Chicago before. Was thinking where can I take them to really show off the city these days, been a while since I've been out. The obvious tourist places like the Signature Room at the Hancock Center should be good for the amazing view, a little touristy I know but I think they will enjoy it. They are younger, in their 30's. Any thoughts?