When the tide retreated along the Welsh coast, something extraordinary emerged. For generations, locals have whispered about a drowned kingdom beneath the waves, Cantre’r Gwaelod, the so-called “Welsh Atlantis.” In this video, we explore the discoveries and the unsettling clues that suggest these ancient stories may not be myths at all, but echoes of real events from the worlds distant past.

This episode examines new evidence uncovered along Cardigan Bay: sunken forests preserved for thousands of years, ancient footprints, hardened peat layers, submerged structures, shifting coastlines, and the mysterious appearance of islands on medieval maps that no longer exist today. These findings force us to confront the possibility that the legend of Cantre’r Gwaelod may be rooted in genuine environmental upheaval.

We also look outward to global parallels. From Atlantis to Hy-Brasil, from Lemuria to Doggerland, civilisations around the world have passed down stories of lands lost to the sea. Why do these themes appear everywhere? What memories were preserved and retold across generations? And what does the newest evidence from Wales reveal about the truth behind these shared myths? What the tide uncovered may change how we understand the ancient world and the stories we tell about it.

This episode explores the full legend of Cantre’r Gwaelod and its origins in Welsh folklore, alongside the evidence emerging from the shores of Cardigan Bay. We look at the submerged forest at Borth, archaeological footprints sealed in peat, medieval maps depicting vanished lands, and scientific explanations that link together global flood stories. We compare the Welsh account with Atlantis, Hy-Brasil, Lemuria, Doggerland, and many other lost worlds, asking whether these stories are rooted in shared human memory.