Burj Khalifa is a megatall skyscraper in Dubai, United Arab Emirates. With a total height of 829.8 m (2,722 ft) including the antenna and a roof height of 828 m (2,717 ft), the Burj Khalifa is the tallest structure in the world since topping out in late 2008. Burj Khalifa was designed to be the centrepiece of a large-scale, mixed-use development that would include 30,000 homes, nine hotels, 3 hectares (7.4 acres) of parkland, at least 19 residential towers, the Dubai Mall, and the 12-hectare (30-acre) artificial Burj Khalifa Lake. Construction began on 6 January 2004, with the exterior of the structure completed on 1 October 2009. The building officially opened on 4 January 2010.
