The Burj Dubai, the world's tallest building, in Dubai, United Arab Emirates, on the official opening of the building Monday, Jan. 4, 2010. the Burj Dubai is over 800 metres (2,625 ft) tall and has more than 160 stories, the most of any building in the world and has an observation deck on its 124th floor with 360-degree views of the entire city. The Burj Dubai is home to the world's first Armani Hotel, luxury offices and residences and will ultimately contain a community of up to 12,000 people. (AP Photo/Kamran Jebreili)