Secrets of the Dunes

S19, E8: Secrets of the Dunes

Available on Prime Video
800 years ago, the people of Kenfig, on the south coast of Wales, thought they had built the perfect town. It was erected around a harbor with easy access to the sea and sheltered from most elements and enemies. The town appears to have been a thriving commercial success, but then it vanished, leaving just a few castle walls to mark its existence. What happened to this utopia?