The Chicago Architecture Foundation is hosting Open House Chicago - a giant open house of 150 of the coolest places in the city - landmarks to design firms and everything in between. It's a great event - heavily attended, long lines at the most popular places. And the best part ... it's free! The only problem is that you have to be very organized - know the hours each site you want to visit, map out your attack and get out early to get in as much as possible!
I stopped in Fourth Presbyterian Church to see if I could finally get past the main hall, but sadly they had a private event and closed to the tour at 1pm - I failed to do my research! Oh well. I got some fun shots anyway. Will have to do better planning next year!