A part of the old Duisburg steel factory turned into a climbing object.
Just one of the many weird locations in the Landschaftspark Duisburg Nord, a must-see place: http://en.landschaftspark.de/startseite
High up on the blast furnace.
I could not understand a word of what he was saying because it was in Hungarian. However, the audience was listening with great attention so it must have been a good story...