"Der Klang der Familie: Berlin, Techno and the Fall of the Wall" [0] is a good book on the origins of the Berlin Techno scene. It's based on interviews and discussions by the people originally setting up the whole thing, making it a pretty breezy read that you don't necessarily have to go through chronologically. No city can really replicate the absurd situation Berlin was in after the second world war. The absolute…
The ladder was into the cellar of the Fischbüro location somewhere in Kreuzberg 36. (these guys started Tresor later)
(Eimer (Bucket) was a really bad location several years later, you wouldn't have been able to get out of the basement if ...)