There are plans for a 2,749 ft skyscraper, Sky City One, in the Chinese city of Changsha. If the project is approved and completed as planned, it would become the tallest building in the world, 33 ft taller than the Burj Khalifa in Dubai. 26 November 2013Picture: HAP/Quirky China News/REX

Credit : HAP/Quirky China News/REX