The Kingdom Tower in Jeddah will be 1km tall, dwarfing the current tallest building, the Burj Khalifa in Dubai. Saudi Arabia is scheduled to begin building the world’s tallest tower next week, which will soar 1km in to the sky when completed. The Kingdom Tower in the coastal city of Jeddah will measure 3,280 feet (1km), some 568 feet (173 meters) taller than the current Guinness world record holder, Dubai’s Burj Khalifa, which stands at 2,716 feet (827 metres). At an estimated cost of $1.23bn, the tower in Saudi will require approximately 5.7 million square feet of concrete, 80,000 tonnes of steel for its 200 floors ... (full story)