Adfeilion Dyffryn Nantlle a’r Cylch Maen y Gaseg Afon Ddu Llwyn y Betws Dinorwig I Dinorwig II Adfail Capel Uchaf Cae Glas I Maen y Gaseg III Dinorwig III Adfail Nebo Bryn Llidiart II Bryn Llidiart I Maen y Gaseg