There's a strange world of daredevil YouTube videos that form the entire center section of a Venn diagram graphing awe-inspiring feats of idiotic bravery and things you should absolutely never try yourself. In that middle section, you'll find Romanian rooftopper (and occasional juggling daredevil on a unicycle) Flaviu Cernescu. He just scaled the tallest chimney in Europe for a video that will flip the stomach of anyone with a healthy fear of heights.
Cernescu and his partner filmed their ascent up the chimney, which is unnamed in the description but is presumably in Trbovlje, Slovenia. There you'll find both the Save River and a 1,197-foot chimney that matches the description in the video.
The duo starts their climb with the goal of hitting the top before sunset. Yes, they're climbing down without safety equipment in the dark, which makes the lunacy of their endeavor all that much more
impressive terrifying stupid... let's... uh... let's stick with impressive.