If you want to learn more about the tunnel networks under Old World building complexes in our cities, check out My Lunch Break’s Youtube channel. He studies old world architecture / civilization all over the world and the tunnels constantly come up. Here is an episode specifically on them.
https://youtu.be/jciQKw9OyVI?si=vOuTP5knVltLYoD_
If you want to learn more about the tunnel networks under Old World building complexes in our cities, check out My Lunch Break’s Youtube channel. He studies old world architecture / civilization all over the world and the tunnels constantly come up. Here is an episode specifically on them. https://youtu.be/jciQKw9OyVI?si=vOuTP5knVltLYoD_