Forget Burj Khalifa the world’s tallest skyscraper which stands at a whopping 2700 feet. Check out the Kingdom Tower, which will be constructed in Jeddah, Saudi Arabia. The project just got a green signal and would cost $30 billion. At a staggering 5280 feet (1 mile), the Kingdom Tower will be (by far) the tallest man-made structure even built. Number of floors you ask? Around 275!