The Tokyo Sky Tree (東京スカイツリー Tōkyō sukai tsurī) is a telecommunications and observation tower in the Sumida special ward of Tokyo. Completed in 2012, since 2010 it has been the tallest tower in Japan and, with its 634 meters of height, it is the tallest tower in the world and the second tallest man-made structure in the world after the Burj Khalifa skyscraper in Dubai.