DOWNTOWN -- Dozens of the most striking Downtown and Near West Side buildings will open their doors for this weekend's Open House Chicago.

Open House, organized by the Chicago Architecture Center, is Saturday-Sunday, putting more than 170 sites in more than 20 neighborhoods on display.

New on the Downtown tour this year: the exclusive, private University Club of Chicago and the award-winning architecture, planning and interior design firm SCB. You can also check out the Teatro ZinZanni theater space, housed in an antique Belgian Spiegeltent (mirror tent) built into the 14th floor of the Cambria Hotel, a former Masonic Temple space.

Check the individual site listings for more details and hours of operation.