this post was submitted on 10 Jun 2026
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[–] Hubi@feddit.org 30 points 3 weeks ago* (last edited 3 weeks ago) (3 children)

Depends. There are a bunch of Flak towers from WW2 all over Europe that were so massive and structurally sound that it was pretty much impossible to tear them down after the war. The Soviets tried to blow up one in Berlin and it literally just split in two. It was deemed too much work to dismantle it so they just piled rubble on top and turned it into a hill.

There's another larger one in the center of Hamburg and the Brits calculated that the amount of explosives needed to bring it down would level the entire city, so they left it. Another one in Hamburg failed to blow up with 16 tons of explosives. Only the interior walls collapsed and the exterior remained intact. It's still in use today.

I'd wager that these buildings could very well survive thousands of years.

[–] janus2@lemmy.zip 20 points 3 weeks ago (1 children)

the fuck are they made of!? Nokia cell phones!?

[–] Hubi@feddit.org 23 points 3 weeks ago

Lol, for the most part ferroconcrete with steel reinforcements. But the main reason they are so indestructible is just the fact that their walls are between 2 and 4 meters thick. They were designed to shrug off direct hits from 1000kg bombs.

[–] littleomid@feddit.org 9 points 3 weeks ago

Our rehearsal room is in one of those bunkers. They are sometimes ridiculously complex with all the corridors and rooms, but they are indeed extremely sound.

[–] teyrnon@sh.itjust.works 4 points 3 weeks ago (1 children)

Why take them down at all and not repurpose them?

[–] Hubi@feddit.org 5 points 3 weeks ago

It probably had something to do with the demilitarization of Germany. But yeah, most of them were repurposed in the end. One is now a hotel, school and club, one is a green energy storage and another was turned into a massive aquarium.