Jan. 4, 2010 -- The Burj Khalifa (formerly known as the Burj Dubai) opened today, officially becoming the world's tallest building. Standing at a height of 828 meters (2,716 ft) tall, the United Arab Emirates (UAE) landmark has more than 160 stories, the most of any building in the world. The tower has a 360 degree observation deck on the 124th floor and plays host to the world's first Armani Hotel. The Burj Khalifa will ultimately become a community of 12,000 residents all using the building's self-contained facilities for work, home and recreation.
Although new skyscrapers are completed every year internationally and the much coveted "World's Tallest" record is always being broken, the Burj Khalifa -- named after UAE President Khalifa Bin Zayed -- towers over its nearest competitor (the 508 meter tall Taipei 101 in Taiwan) by an impressive 320 meters (1050 ft).
--Ian O'Neill, Discovery News