New Building Takes US Tallest Building Title

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1 World Trade Center in New York is the tallest building in the United States, measuring 541.3 meters tall.

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The Willis Tower, formerly known as the Sears Tower, in Chicago, Illinois is 442 meters tall.

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The Burj Khalifa in Dubai, United Arab Emirates, is the tallest completed building in the world and measures 828.14 meters.

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The Abraj Al-Bait Tower, also known as Makkah Royal Clock Tower Hotel, in the Saudi holy city of Mecca, is the second tallest completed building in the world at 601 meters tall.