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.
China World Trade Center Tower III
In 2010 the China World Trade Center Tower III took the title of "world's tallest building with a roof-top helipad" from the US Bank Tower. Its helipad is 330 m (1,083 feet) high compared to the US Bank Tower's helipad at 310.3 m (1,018 feet). As of Dec, 2018, China World Trade Center Tower III is the second tallest building with a roof-top helipad, with the tallest being the Guangzhou International Finance Center tower which is located in Guangzhou with a height of 439 m (1,439 feet) high.