The Burj Khalifa, known as the Burj Dubai before its inauguration in 2010, is a skyscraper in Dubai, United Arab Emirates (UAE). With a total height of 829.8 m (2,722 ft) and a roof height of 828 m (2,717 ft), the Burj Khalifa has been the tallest structure in the world since its topping out in late 2008.