Some people are crazy. Like, really crazy. Guys like Russian and Ukrainian duo Vadim Makharov and Ritaliy Raskalov, who like to climb really tall buildings, without any safety gear. They do wear GoPros though, just that we can watch the footage back on YouTube.

Here they climbed the 660m tall Ping An Finance Center in Shenzhen, China—the second tallest building after the Burj Khalifa in Dubai. It’s also still under construction, so it’s even more dangerous.

[via Design Taxi]