Folklore & legend

Tregaer Anrheg, the Court Beneath the Sea

Also known as: Caer Arianrhod; Tre' Gaer Anrheg

Caer Arianrhod reef, off Dinas Dinlle

Tregaer Anrheg, the story goes, was home to a family of robbers. Among their crimes they killed and robbed a man at Glyn Iwrch, near the far wall of Glynllifon Park, and that murder filled the measure of their lawlessness.

One woman lived with them who was no relation. One evening she went out with her pitcher to fetch water and heard a voice say, "Dos i ben y bryn i wel'd rhyfeddod", go to the top of the hill to see a wonder. She did as she was told. The hill meant was Dinas Dinlle, the old fort on the cliff. As soon as she reached the top she looked back and saw Tregaer Anrheg sinking into the sea.

The stones of the reef, showing only at the lowest spring tides, were pointed out as all that is left of the robbers' court.

The reef is offshore and only exposed at very low tides; Dinas Dinlle beach and hillfort are publicly accessible. Do not attempt to walk out to the reef.
Evidence
Long-standing local tradition
Access
Open ground
Location
53.082, -4.335 (Parish-level only, treat as an area)

Sources: John Rhys, "Celtic Folklore: Welsh and Manx", vol. 1 (1901), Project Gutenberg [public-domain]

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