Construction workers on skyscrapers must have nerves of steel and obviously can’t be afraid of heights. Once false move and there’s not a hardhat in the world that can protect you. Two daredevils traveled to China to visit Shanghai Tower, the world’s second tallest building (only to Burj Khalifa in Dubai). Their mission: to climb to the top of the skyscraper while it’s still under construction and stand on the edge of the crane. The result was some breathtaking photos from atop one of the world’s tallest buildings.