Location: 99XX+6R Piriac-sur-Mer, France
Lost Civilizations / Ruins
by @anton
According to local legend, the ancient town of Piriac lies beneath the sea, its cemetery still releasing human bones with the tides. The tomb of King Solomon is said to remain hidden, guarded by an army of korrigans (Breton fairies) who protect a vast treasure fed by centuries of shipwrecks.
Source : Henry Quilgars, revue des traditions populaires, p614
Part of the legend: The Sunken City