The tallest tower in the complex stands as the tallest building in Saudi Arabia, and the tallest and largest hotel in the world, with a height of 601 metres (1,972 feet). Currently it is the second tallest building in the world surpassing Tapei 101 and the fourth tallest structure in the world. The structure had surpassed Dubai International Airport having the largest floor area of any structure in the world with 1,500,000 m2 (16,150,000 sq ft) of floorspace. It also surpassed the Emirates Park Towers in Dubai as the world's tallest hotel. (wikipedia).