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Photo name: Willis Tower
Picture category: Structures
Image size: 58 KB
Dimensions: 466 x 599
Photo description: Formerly known as Sears Tower, the Willis Tower was the tallest building in the world when it was completed in 1973. It has since lost that title but at 442 metres tall (1451 feet) in height, it is still an impressively tall building. Located in Chicago, USA, the Willis Tower features 108 floors. For more information on amazing buildings, check out our list of the top ten tallest buildings in the world.