Image by Luiz Felipe Castro Getty Images

This is the new name for the John Hancock Center Observatory. In many ways the view here surpasses the one at Willis Tower. The 94th-floor lookout has informative displays and the TILT feature (floor-to-ceiling windows that you stand in as they tip out over the ground; it costs $7 extra and is less exciting than it sounds). Not interested in such frivolities? Shoot straight up to the 96th-floor Signature Lounge, where the view is free if you buy a drink ($8 to $16).