Cei'r pentref Llithfaen ar lethrau deheuol yr Eifl. Ar gopa'r mynydd mae un o safleoedd cyn-hanesyddol pwisicaf a mwyaf godidog yng Nhymru sef Tre'r Ceiri.

Lleoli'r pentref ar hyd y lon Fawr y B4417. Mae yna siop sydd yn gael ei rhedeg gan y gymuned a Tafarn Y Fic yw'r unig tafarn.

Mae Nant Gwrtheyrn yn Ganolfan Iaith.

Llithfaen lays on the southern slopes of yr Eifl. These volcanic peaks are crowned by Tre'r Ceiri which is one of the most spectacular of Wales' ancient monuments.

The village lies along the B4417 the main northern coastal road into Llŷn. There is a public house in the center of the village- 'Y Fic', and a village shop that is run by the community.

Nant Gwrtheyrn is a Welsh language center.