Arianrhod

Or Caer Arianrhod, the Celtic “Fortress of the Silver Wheel,” referring to
the concentric walls of Atlantis decorated, according to Plato, with precious
metals. In some versions of her myth, Arianrhod was a woman who was responsible
for the sinking of Caer Arianrhod, a Brythonic legend common along the
Carnarvon coast, where a reef out at sea is associated with the remains of her
sunken castle. According to Book I of Taliesin, a medieval collection of Welsh
traditions with deeply prehistoric roots, “There is a caer of defense (a fortified
city) under the ocean’s wave.” Artists and magicians went to Caer Arianrhod for
the most advanced instruction, a Welsh recollection of the sophisticated civilization
universally associated with Atlantis.