The Legend of Cardigan Bay Cardigan, Cardiganshire
Tradition says that Cardigan Bay was once dry land. It was then known as the Lowland Hundred (Cantref y Gwaelod) and boasted no less than sixteen cities. But the land lay lower than the level of the sea, and dykes were built to keep back the ever-encroaching waters. Disaster came through the foolishness of Siethennin the Drunkard, son of the King of South Wales, who in one of his mad fits opened the sluices. The inhabitants fled in terror to the uplands, leaving their land forever to the dominion of the sea.