360 Chicago - John Hancock Center
360 Chicago (formerly John Hancock Observatory) is located in the John Hancock Center, which offers tremendous views of Chicago’s famous skyline, the glistening lakefront, and four states.
The John Hancock Center is the 8th tallest building in the USA - a 100-story, 1,127-foot skyscraper piercing the skies of the Windy City. This amazing structure lets visitors zoom up 1,000 feet in just 40 seconds, thanks to the fastest elevators in North America.
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I recommend this if you ever come to Chicago.