🇫🇷 France · Megalith
Er Lannic Stone Circles
Early to Late Neolithic · Morbihan Atlantic
Tidal double stone circle on Er Lannic island, Gulf of Morbihan, half-submerged, 4500 BCE.
🇯🇵 Japan · Megalith
Yonaguni Monument
Geological: Early Miocene sandstone (20 Ma) formation; if artificial, claimed Jomon or earlier (10,000–2000 BCE) · Disputed – natural geology vs hypothetical Jomon / lost Pacific civilization
Submerged sandstone formation off Yonaguni Island discovered 1986 featuring stepped terraces up to 27 m high, flat surfaces and apparent right angles at 25–30 m depth, extending ~150×40 m.
🇮🇱 Israel · Submerged site
Atlit-Yam
PPNB (6900–6300 BCE) · PPNB Neolithic
Pre-Pottery Neolithic B mega-village (6900–6300 BCE) submerged 300–400 m offshore after post-glacial sea rise, with stone wall 150 m, paved well 5.5 m deep (earliest seawall and well), megalithic…