Youtubers On The Roofs have gained fame for their daredevil free climbing of skyscrapers all around the world. Last year they scaled the 650 metre Shanghai Tower, but this time they’ve gone even higher – free climbing to the top of the 660 metre high Shenzhen Centre in China. The building is still under construction, but when has that ever been an obstacle? Check out the incredible (and mega scary!) footage below.