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.
Manhattan
The former Twin Towers of the World Trade Center were located in Lower Manhattan. At , the 110-story buildings were the world's tallest from 1972 until they were surpassed by the construction of the Willis Tower in 1974 (formerly known as the Sears Tower, located in Chicago). One World Trade Center, a replacement for the Twin Towers of the World Trade Center, is currently the tallest building in the Western Hemisphere.