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🇩🇪 Germany · Submerged site
Early Medieval (8th–12th c. CE) · Wendish Slav / Viking / hypothesized
Baltic Atlantis — Adam of Bremen Jumne 1075, claimed sunken off Usedom/Wollin with Koserow pavement at −5 m (contested glacial till).
🇬🇧 United Kingdom · Submerged site
Greek geographic phantom (500 BCE – 300 CE) · Greek geographer / Phoenician trade secrecy
Herodotus ten Tin Islands phantom – Cornish tin coast inflated to archipelago at 50°N 5°W.
🇲🇦 Morocco · Natural feature
Pleistocene paleo-island (exposed > 20k – c. 11,600 BP); Atlantis claim 9600 BCE · Natural Quaternary; claimed Atlantis early Holocene (Plato source)
56 m deep paleo-island off Tangier — Collina-Girard's 2001 Atlantis candidate drowned 11,600 yr ago.
🇫🇷 France · Submerged site
Legendary 5th c. (Gradlon of Cornouaille) – folklore recorded 19th c. · Breton / Cornish Celtic Christian syncretism (Dahut as pagan vs Christian)
Gradlon's sluice-gated city in Douarnenez Bay — daughter Dahut drowns it opening gates at high tide.
🇬🇧 United Kingdom · Submerged site
Legendary 6th c. (Gwyddno) / literary 13th–15th c. · Welsh Celtic / Cumbric
16 villages west of Wales — dyke-keeper Seithenyn's drunken neglect floods lowland; causeways are glacial moraines.
🇮🇪 Ireland · Submerged site
Portolan phantom (1325–1450) · Catalan–Italian cartography
Southern Brasil rock phantom at 51°N 16°W – second Brasil duplication south of Hy-Brasil, Porcupine plain.
🇨🇦 Canada · Submerged site
Pseudo-voyage phantom (1558–1630) · Venetian pseudo-geography / Zeno forgery
Zeno 1558 cannibal giant phantom at 57°N 42°W south of Estotiland – Labrador Sea 3000 m.
🇪🇸 Spain · Submerged site
Portolan phantom (1424–1448) · Venetian–Portuguese cartography
Canaries Royllo phantom 1424 – 30 km islet at 29°N 18°W west of Ferro, abyssal.
