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The Burj Dubai in the United Arab Emirates
The Burj Dubai in the United Arab EmiratesPhoto by Flickr Member Leandro's World Tour, license CC BY 2.0
The Taipei 101 Tower in Taipei, Taiwan
The Taipei 101 Tower in Taipei, TaiwanPhoto © Turner Construction
The Sears Tower or Willis Tower
The Sears Tower ("Willis Tower") in ChicagoPhoto © Mary Ann Sullivan, Digital Imaging Project