Mae Garnfadryn yn bentref bach ar yr llethrau ddeheuol o fynydd Garnfadryn, sydd yng nhanol Pen Llŷn, ac iw weld o rhan fwyaf o lefydd yn Llŷn.

Y mae yna Bryngaer oes y haearn ar gopa y mynydd

The village of Garnfadryn lies on the southern slopes of Garn Fadryn. This mountain is situated at the center of Llŷn and can be seen from most parts of Llŷn.

The mountain above the village is crowned by an Iron age hill fort.