Had some fun working with this sketch from Let's Get Sketchy:
One of my favorite things about Chicago is Millennium Park on Michigan Avenue. It features Cloudgate and the Jay Pritzker Pavillion. This page features a few photos taken of (and from) the park during a couple recent trips to Chicago.
The photo on the left was taken from the park looking down Madison Street...if you look carefully, you can see the "L" (elevated) train going down Wabash Ave a couple blocks down.