List of tallest buildings and structures
The world's tallest artificial structure is the Burj Khalifa in Dubai (of the United Arab Emirates). The building gained the official title of "Tallest Building in the World" and the tallest self-supported structure at its opening on January 9, 2010. The second-tallest self-supporting structure and the tallest tower is the Tokyo Skytree. The tallest guyed structure is the KVLY-TV mast.
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.