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.
Alain Robert
On 28 March 2011 Robert climbed the tallest building in the world, the 828-meter Burj Khalifa tower in Dubai, taking just over six hours to complete the climb. However, he used a harness in accordance with safety procedure.