Burj Khalifa is the tallest building in the world that has been made by humans. Starting from the height of Taipei 101 as the tallest building in the world on July 21, 2007. On September 12, 2007, Burj Khalifa made it past the height of the CN Tower as the highest free structure in the world and on April 7, 2008 the highest structure in the world from the KVLY-TV Tower in Blanchard, North Dakota, the United States successfully passed. The highest structure ever made by humans, The Warsaw Radio Tower 645.4 m (2,120 feet) was made in 1974 (but collapsed during renovations in 1991) successfully passed on September 1, 2008.
Burj Khalifa has another record with tower has the fastest elevator with a speed of 60 km/h or 16.7m/s, and buildings with the most floors: 160 (formerly Willis Tower and World Trade Center - 110 floors).