We went all over,starting with the Peggy Notebaert Nature Center which includes a butterfly sanctuary.
Then we went to the Willis Tower (Sear Tower) Sky deck. We had a clear day and the views of Chicago were great. There's a part where you can stand on a glass floor which kind of scared the crud out of me and of course Griff pushed me a little to make me feel like I was falling off a building.
The gift shop offered some clearly American treats, such as this pizza hat. A new fashion trend?