You've probably seen Millennium Park, Wrigley Field and the John Hancock Center. But what about more off-the-beat places in Chicago that also define our city?

Places like the South Shore's Mosque Maryam or Park Gables, a Tudor Revival apartment complex in Rogers Park.

On Saturday and Sunday, the Open House Chicago will give you a chance to see more of the defining architecture in Chicago by providing free access to nearly 190 sites in 13 neighborhoods.

Sun-Times' Thomas Connors has more information.