Chicago has more drawbridges than any other city in the country (if you believe the guy who does the PBS specials).  This is a control tower for one of those drawbridges near the Sears Tower (soon to be renamed the Willis Tower, but I’ll be surprised when people around here start referring to it as such).

I drew this during the last 15 minutes of my lunch hour; we are finally starting to get some nice temperatures here.  Given the short amount of time spent, I was obviously not going for a great amount of detail — I just wanted to capture the shadows.  My proportions are off a little — the tower is actually a little more squat than I have captured here.  But I am still glad to be able to get outside to draw.