John Hancock Observatory at 875 North Michigan Avenue in Chicago is a 100-story, 1,127-foot (344 m) tall skyscraper. Here is how to plan you visit and to buy tickets. The waiting time for the elevators is 20 minutes on average, compared to more than 1 hour for Sears (Willis) Tower. The parking in the building costs $25. A CityPass, $76, saves you 50% when visiting top 5 Chicago attractions but is must be used within 9 days.
A view of Navy Pier.
A view of the tallest skyscraper in Chicago - formerly known as Sears Tower, now Willis Tower.
A view from the open deck.
John Hancock Center
John Hancock Center. Wikipedia.
Chicago Tower Smackdown: Willis Skydeck vs. Hancock Observatory
The world's highest observation decks - Telegraph UK http://goo.gl/5drN7
French firm buys Hancock Observatory - chicagotribune.com, 2012 http://goo.gl/8BQaO