Shanghai Tower is the world's third-tallest structure behind a building that reached its full height in which year ?
Tokyo Skytree Tokyo Skytree (東京スカイツリー , Tōkyō Sukaitsurī ) is a broadcasting, restaurant, and observation tower in Sumida, Tokyo, Japan. It became the tallest structure in Japan in 2010 and reached its full height of 634.0 m in March 2011, making it the tallest tower in the world, displacing the Canton Tower, and the second tallest structure in the world after the Burj Khalifa (829.8 m/2,722 ft).
Jeddah Tower Jeddah Tower (Arabic: برج جدة‎ ‎ ), previously known as Kingdom Tower (برج المملكة ) and Mile-High Tower (برج الميل ), is a skyscraper under construction in Jeddah, Saudi Arabia, at a preliminary cost of SR4.6 billion (US$ ). If completed in 2020 as planned, the Jeddah Tower will reach an unprecedented height, becoming the tallest building in the world as well as the first structure to reach the one-kilometre-high mark.