Doggerland - Lost Civilization at the bottom of the North Sea

Doggerland was an area of land, now submerged beneath the southern North Sea, that connected Great Britain to continental Europe. Geological surveys have suggested that it stretched from what is now the east coast of Great Britain to what are now the Netherlands, the western coast of Germany and the peninsula of Jutland. Rising sea levels gradually reduced it to low-lying islands before its final submergence. Doggerland was named after the Dogger Bank, which in turn was named after 17th-century Dutch fishing boats called doggers.