Burj Khalifa It is the tallest artificial structure in the world, standing at 829.8 m (2,722 ft) 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,and is part of the new 2 km2 (490-acre) development called Downtown Dubai at the 'First Interchange' along Sheikh Zayed Road, near Dubai's main business district. อาคารที่มีจำนวนชั้นมากที่สุด