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.
Skidmore, Owings &amp; Merrill
One World Trade Center, also known as the Freedom Tower, is located in Manhattan, New York City, and is high, making it the tallest building in the Western Hemisphere. After Daniel Libeskind won the competition for master-planning, SOM was awarded the architectural design contract for the Freedom Tower, despite having withdrawn their entry in the original design competition.