How Could This Be Built 600 Years Ago? https://www.youtube.com/watch?v=U_RQ_cxpqUo Tartaria Vault
Is this supposed to be a variation of the Mandela Effect? Remnants of older buildings from an alternate timeline?
Who Could Have Possibly Built This in 1779? https://www.youtube.com/watch?v=ZlxrZ77_ue0