Chicago: Square without a square?

hey, guys, i'm probably guitlty of incredibly weird thinking (for the um-teenth time).... Chicago has lots of parkland and mercifully a downtown with a lakefront park (Grant) and two lakefront parks (Lincoln and Burnham) that abut the north and south ends of the downtown district. That Millennium Park is a park-within-a-park-without-peer is not even a question. Meanwhile, downtown offers plenty of nice open spaces with plazas as inviting as Bank One, JHC, and others. So we're not lacking here. But for some reason, some surprising reason, we don't have something that so many big cities have: A LARGE SQUARE IN THE HEART OF DOWNTOWN, ONE BLOCK SQUARE IN SIZE. I'm talking about what Block 37 looks like, but, of course never was intended to become. I'm talking about Union Square in SF and Union Sq in Manhattan (since the other squares are just cuts made by Bwy), like Pershing Sq in LA and the circles and squares that dominate DC and Boston. Or even like Circus Martius going up in downtown Detroit right now. We don't have one. And while it would be nice, is it sort of ho-hum-who cares considering the other great open space downtown? thoughts?>