Saudi Arabia’s Kingdom Tower Looks to Set a Record

              

                                At 830 m from base to tip, Dubai’s Burj Khalifa is the world’s tallest building—for now

Meet the architect behind the planet’s tallest towers

If you take the world’s longest elevator ride up the world’s tallest building and venture out on the world’s highest outdoor observation deck, the sensation is a bit like being on an airplane that is idling midair to allow passengers to peer down at the earth. The term bird’s-eye view hardly describes it, since the 124th floor of the Burj Khalifa in Dubai—452 m above the ground—is higher than the cruising altitude of many birds. …

source - TIME

check the time.com for more details