World's Tallest building

The Burj Dubai tower, worlds tallest building stands 800 metres tall - just 5 metres shy of half a mile. That is nearly 300 metres taller than the tallest floored building in the world today, the Taipei Tower in Taiwan
The new tower's unique, three-sided design ascends in a series of stages, around a supportive central core and boasts total of 160 floors, accessible via a series of double-decker elevators. Its shape is integral to its impressive size. The design is intended to reduce the impact of wind and to reduce the need for a stronger core - allowing for more space - as it ascends.In officially opening the building, officials revealed two facts: the actual height of the tower is 2,716.5 feet tall, and the building's name has been changed to the Burj Khalifa, the name of the ruler of Abu Dhabi.