Shenzhen Centre (660 meters)

As though climbing the Shanghai Tower wasn't enough, the two daredevils from "On The Roofs" are back, this time scaling the 660-meter-high Shenzhen Centre building in China, which will be the second tallest building in the world once completed. Just getting onto the roof clearly wasn't high enough, so the duo decided to free climb up one of the cranes as well. Watch the video below.