To begin with, there was the Lincoln Park Zoo.
Its collection of exotic animals is amazing.
Then of course, the Sears Tower (now called the Willis Tower), which at 442 metres was the tallest building in the world for 25 years.
It was also the tallest building in America until this year; it's just been eclipsed by One World Trade Centre.
But I have to say I was a little underwhelmed -- it really didn't feel that big to me.
The waterfront including Navy Pier was a huge hive of activity as you'd expect.
The Ferris Wheel was just crazy!
We didn't get to ride the "el" (the elevated train network) but saw the trains going back and forth constantly.
Oh, and of course we visited the Legoland Discovery Centre which the boys had been looking forward to for AGES.
And who said touring Chicago is a nightmare for people in RVs?!