🇬🇷 Greece · Buried city
Helike — Bouras Plain Borehole Submerged City (Gulf of Corinth)
Early Bronze to Classical (c.2600 – 373 BCE) · Achaean Greek
373 BCE tsunami-lost Helike — Classical city and EBA settlement both buried 3 m under Bouras lagoonal marine silt 60 m inland, originally submerged.