The Chicago Architecture Center (CAC) is proud to host Open House Chicago (OHC) on October 19-20, 2024. OHC is a free public festival that offers behind-the-scenes access to architecturally, historically and culturally significant sites throughout Chicago, plus more than 40 events and programs at the sites, including demonstrations, talks and arts performances. While you're out exploring, don't forget to participate in the OHC photo competition—capture your favorite moments/architecture and submit your photos for a chance to be featured. Go explore!