CHINESE COMPANY PLAN TO BUILD WORLD TALLEST SKYSCRAPER IN JUST 90 DAYS.

Sky City in Changsha, south-east China (pictured in an artist's impression), will be a 220-storey structure standing at an incredible 2,749ft (838m). It will house 17,400 people and also boast hotels, hospitals, schools and office space with occupants using 104 high-speed lifts to get around. The half-mile high superstructure will be 32ft taller than the Burj Khalifa in Dubai - the current tallest building - and is expected to cost almost half as much.