Chicago Twlight Magnet

When you visit Chicago, you can't miss its remarkable skyline, dominated by architectural wonders like the 1454-foot Sears Tower and the still-futuristic-looking Marina City "corncobs" built in the early 60's. The skyline jumps out at you from every window, leers over you as you shop Michigan Street's "Magnificent Mile", and reaches up at you from below when you ride up 100 floors to the observation level on the John Hancock building. But under the skyline, under the streets even, lies another city.