(YouTube link)

WARNING: Do not watch this if you are prone to vertigo or have an extreme fear of heights. On top of a skyscraper in Moscow, there's a spiral staircase rising from the roof. At the top of the staircase, there's a ladder that goes even higher. A guy with a camera climbs it, even though it's covered with snow. We do get to see him come down safely after his adventure. -via Everlasting Blort

Update: A commenter has identified the climber as Artem Pirniazov. -Thanks, gorechi!