The Welsh legend of Cantre'r Gwaelod, a lost land sunken below Cardigan Bay, has persisted for almost a millennium.

First written about in the mid-13th Century, it is likely the myths and legends surrounding the Welsh Atlantis date from long before that.

Yet there has never been any definitive geographical evidence for the mythical land… until now, perhaps.

A medieval map has been uncovered which depicts two islands off the Ceredigion coast - now lost to history.

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