If you weren't afraid of heights before, this video might just change that.
Filmed by Flaviu Cernescu, it shows his POV as he climbs a 290 metres chimney in Pitesti, Romania - with no harness or safety equipment. He uses hanging electrical cables for the first part of his climb before switching to some rickety-looking ladders. As he says, do not try this yourself.
It's very high. Too high.
Ah... we imagine going down is even worse but thankfully, he doesn't show us that - just the moment he reaches the ground again, safe and sound.