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9 of the largest buildings in the world

Aug. 21, 2013, 5:49 p.m.
Abraj Al-Bait

Photo: Fayez Nureldine/AFP/Getty Images

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Abraj Al-Bait

This colossal building complex in Mecca, Saudi Arabia, holds a number of prestigious architectural titles. It is the third largest building in the world by floor area. Meanwhile, its clock tower, the Mecca Royal Hotel Clock Tower, is the second tallest building in the world, behind only Dubai's Burj Khalifa. It combines sheer size and height like no other structure in the world.