TALLEST BUILDING

Burj Khalifa , known as the Burj Dubai prior to its inauguration in 2010, is a skyscraper in dubai UAE. With a total height of 829.8 m (2,722 ft, just over half a mile) and a roof height (excluding antenna, but including a 244 m spire) of 828 m (2,717 ft), the Burj Khalifa has been the TALLEST  in the world since its  in 2009.