The Burj Khalifa, built in 2009, currently holds the title for the tallest skyscraper in the world. Costing 1.5 billion dollars to build and standing at a height of 2,722 feet, the engineering required to construct it is both fascinating and impractical.
Discussion about the tallest building in the world, Burj Khalifa, and comparison of its height to previous tallest building, Willis Tower.