The Humboldthain Flak Tower is mostly buried in rubble, they created an artificial hill from it in the park after the war. Apparently it’s a significant roost for bat colonies, so cue The Birthday Party’s ‘Release the Bats’ (nicely time and space specific as Nick Cave was living in Berlin around that time IIRC).
Won’t be looking at it, at least in part because Humboldthain Park was in the French Sector (part of the municipality of Wedding IIRC). Now if someone wants to produce 28mm early ‘80s French, I’ll be all over them like a cheap suit.