• Hubi@feddit.org
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      2 days ago

      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.

        • Hubi@feddit.org
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          2 days 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
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        2 days 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.

        • Hubi@feddit.org
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          2 days 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.

      • k0e3@lemmy.ca
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        2 days ago

        If anything, it destroys whole ass science labs according to this documentary called Jurassic World.

    • Honytawk@discuss.tchncs.de
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      2 days ago

      Plenty of things build today will last much longer:

      Every nuclear waste disposal site (hopefully)

      Seed vaults

      Nuclear bunkers

        • lemmur@szmer.info
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          21 hours ago

          Plastic packaging will quickly tear into microplastics, which indeed will last centuries

          • teyrnon@sh.itjust.works
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            2 days ago

            That is true. Roman Concrete is still standing 2k years on. Ours lasts decades, maybe a century if well done.

            They used ash from Mount Aetna in Sicily to make some of it. I forget the thing with the lime, how that was different than what we use?