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CategoriesSubmerged sites
Harbours, towns and monuments now beneath the sea or a lake.
🇬🇧 United Kingdom · Submerged site
Anglo-Saxon to Late Medieval (630 – 1350 CE) · Anglo-Saxon / East Anglian / Norman English
England's great medieval port lost to 700 years of North Sea erosion — churches, friary and quay now mapped 300–900 m offshore on Dunwich Bank.
🇬🇧 United Kingdom · Submerged site
Medieval (1235 – 1362 CE) · Anglo-Norman / Hanse
13th-century Humber port that briefly outranked Hull — parliamentary borough lost 1362 to storms and sand-spit destruction, now under Humber silt.
🇬🇧 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.
🇬🇧 United Kingdom · Submerged site
Medieval (1110–1288 CE) · English Norman / Cinque Ports
Cinque Port drowned 1287–1288 — 50-acre shingle island harbour now −6 m in Rye Bay; New Winchelsea bastide 1292 replacement 2 km inland.
🇬🇧 United Kingdom · Submerged site
Pseudoarchaeology (2021–present) · Pseudoarchaeology (Dogger-Atlantis mashup)
Celtic Shelf pseudo-Atlantis stretching Doggerland to Humber at 54°N 1.5°E – unverified plain crop.
🇬🇧 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.
🇬🇧 United Kingdom · Archaeological wonder
Iron Age (~800 BCE – 100 CE; Oakbank 460 BCE – 200 BCE) · Atlantic Scottish Iron Age (Caledonian)
One of 18 Iron Age timber islets in Loch Tay, Oakbank comprises a 30-m oak pile ring with horizontal alder floors still preserved 2 m deep in cold waterlogged peat.
🇬🇧 United Kingdom · Submerged site
Upper Palaeolithic to Mesolithic · Maglemosian / Mesolithic hunter-gatherers
Vast Mesolithic plain linking Britain to Europe (11000–5500 BCE) with river valleys, forests, hunting camps surveyed via seismic and cores; inundated by post-glacial rise and Storegga tsunami 6200…
