Here at Curbed, it's no secret that we like pretty things. Cut us some slack; Chicago has a whole lot to offer — we dare you to walk around town for an afternoon and not wind up bewitched by an incredible building, unexpected vista, or awesome art installation. That said, part of the beauty of our city is in innovations to the tattered edges of public spaces. Much of the year we live in a tundra, but that doesn't mean the outdoors isn't experienced intensively and creatively. Second City boosterism aside, the thrust of today's map post is to highlight Chicago's use of ubiquitous and inherently unexciting public space — specifically overpasses (highway, El, LSD, etc.) — in capturing some of the best mural art around.