Arguably the greatest setting of all the castles on this list, Harlech not only boasts views of the dunes and sea — but also the breathtaking peaks of Eryri (Snowdonia).
Gellid dadlau mai dyma leoliad gorau holl gestyll y rhestr; nid yn unig bod gan Harlech olygfeydd o'r twyni a'r môr — ond o gopaon trawiadol Eryri hefyd.