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.
The Illinois
If built, it would top the list of the tallest building in the world by far, being more than four times the height of the Empire State Building, and twice as tall as the world's current tallest building, the Burj Khalifa, the design of which is said to have been inspired by that of The Illinois.