List of tallest buildings and structures
The tallest artificial structure is Burj Khalifa, a skyscraper in Dubai that reached in height on January 17, 2009. By April 7, 2008 it had been built higher than the KVLY-TV mast in North Dakota, USA. That September it officially surpassed Poland's Warsaw radio mast, which stood from 1974 to 1991, to become the tallest structure ever built. Guyed lattice towers such as these masts had held the world height record since 1954.
Jeddah Tower
The building has been scaled down from its initial (about one mile) proposal, which was never fully designed, to a height of at least (the exact height is being kept private while in development, similar to the Burj Khalifa). At about one kilometre, Jeddah Tower would still be by far the tallest building or structure in the world to date, standing taller than the Burj Khalifa in Dubai, United Arab Emirates.