Sergey Valyaev and his buddies have illegally climbed the construction crane Mercury City Tower in Moscow. The tower is Europe’s tallest building at 1,112 feet (339 m). What makes this climb particularly frightening to me (outside of the height and security risks) was the amount of snow and ice on rope free climb up the crane. The video below shows how they did it.
This reminds me a lot of this 1,768 foot transmission tower free-climb.