The Aon Center presented a vision of clean vertical lines, rising with aloof calm beside Grant Park. But now, as sharp-eyed skyline watchers have noticed, a nasty little carbuncle has appeared on the roof of the 1,136-foot tower. About 85 feet tall, it resembles a cylinder stuck atop a flagpole. And people are wondering what it is.
What's On Top Of The Aon Center?
featuresblogs.chicagotribune.com - 13 weeks ago - 310 views
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Organizations: John Hancock Center

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Its a giant push-pin for the next time Google Maps takes a satellite picture.
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