ooli@lemmy.world to Today I Learned@lemmy.worldEnglish · edit-22 months agoTIL about erdstall , more than 600 tunnel found across Europe of unknown origin but are believed to date from the Middle Ageswww.atlasobscura.comexternal-linkmessage-square31fedilinkarrow-up1216arrow-down17
arrow-up1209arrow-down1external-linkTIL about erdstall , more than 600 tunnel found across Europe of unknown origin but are believed to date from the Middle Ageswww.atlasobscura.comooli@lemmy.world to Today I Learned@lemmy.worldEnglish · edit-22 months agomessage-square31fedilink
minus-squareP00ptart@lemmy.worldlinkfedilinkEnglisharrow-up1·2 months agoTHATS why they left viewing slits!
THATS why they left viewing slits!