The world's tallest buildings

Published On: Mar 22 2012 09:13:22 AM PDT   Updated On: Sep 02 2015 11:00:00 PM PDT

In honor of National Skyscraper Day on Thursday, take a look at which buildings are the tallest in the world.

Willis Tower, Sears Tower, Chicago
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Cody Hough/Wikimedia Commons

The Willis Tower, formerly known as the Sears Tower, was the tallest building in the world when it opened in 1974 and retained that title until the Petronas Towers opened in 1998. Today, it's the 10th tallest in the world and the second tallest in North America at 108 stories and 1,451 feet.


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