Amongst the sites associated with this storyline are the castles at Caerphilly, Cardiff, Chepstow and Kidwelly as well as Tintern Abbey.
Ymysg y safleoedd sy'n gysylltiedig â'r stori hon mae'r cestyll yng Nghaerffili, Caerdydd, Cas-gwent a Chydweli yn ogystal ag Abaty Tyndyrn.