II*Bryn Bras Castle The castle occupies a triangular site at the junction of the road between Cwm-y-glo and Llanrug and the mountain route from Llanrug to Llanberis; the drive and parking area on the north represent the
IICae'r-maen Between Llanrug and Ceunant; on north-west side of track off lane which leads to Pant Afon.
IICapel Tan-y-coed Located on the east side of the road between Llanrug and Ceunant immediately to the north-east of the former Post Office; low rubblestone wall with stone-on-edge coping to roadside; square piers, spea
II*Church of St Michael Situated on its own in originally rectangular churchyard, now extended to north-east and south-east, on track between Bryn-llan and Plas Tirion approximately 0.75km south-west of Llanrug.
IIFormer Post Office & Nos 1-3 Maes Gerddi Located on the east side of the road between Llanrug and Ceunant immediately to the south-west of the chapel and Sunday School at Tan-y-coed; the cottages behind a low stone wall with railings, the po
IIGlan Seiont Located on the edge of pasture fields at the end of a track off the A 4086 approximately 1.2 km north-west of Llanrug; the building is situated about 300m south-west of the point where the former Caer
IIHafod-rhug-isaf Located at the end of a farm track off the minor road running south-westwards from Llanrug to join the A 4085 between Caeathro and Waunfawr; the house has roofless outbuildings attached to both ends.
IILlwyn Coed Situated at the end of a farm track off the A 4086 in level fields with wooded rising ground behind.
IIPant Afon Located off the east side of the minor road running south-westwards from Llanrug to join the A 4085 between Caeathro and Waunfawr; Llyn Pant Afon lies approximately 50m to the south-east of the house.
IIPant-y-Celyn Located on the east side of the main village street at Cwm-y-glo towards its northern end; low rubblestone wall in front with stone-on-edge coping and decorated iron gate aligned on front door.
IIPen Rallt Located at the end of a track running downslope from the minor road between Cwm-y-glo and Bryn Bras Castle.
IIPlas Bach Located on the road between Caeathro and Pont-rug at the former north-eastern entrance to Glan Gwna Hall; iron gates with fluted iron gate posts stand at the entrance to the former driveway.
IIPlas Gwyn Located in pasture fields at the end of a track on the south side of the A 4086 approximately 1km west of Llanrug.
IIPlas Tirion Located towards the end of a track running south-westwards past the Church of St Michael towards Plastirion Farm; a pool and various ruined outbuildings stand immediately north of the house.
IIPont-Rhythallt Located on the minor road between Llanrug and Penisa'r Waun, where it crosses the Afon Rhythallt.
IIPont-rug Located on the A 4086 between Caernarfon and Llanrug at the point where it crosses the Afon Seiont.
IIPrysgol Located at the end of a long farm track reached off the minor road running south-westwards from Llanrug to join the A 4085 between Caeathro and Waunfawr; the farmhouse is situated to the south of the
IISeiont Manor (also known as Llwyn y Brain) Located off the driveway leading to Seiont Manor Country House Hotel on the north side of the A 4086 approximately 0.7km north-west of Llanrug; the house occupies a raised site with lawned grounds to
IIStables at Plas Tirion Situated on the north-east side of the yard on the other side of the track to the east of the house at Plas Tirion.
IISunday School/Vestry at Capel Tan-y-coed Located directly to the south-west of the chapel with gable end to road, in the same low rubble-walled enclosure, returning at right-angles to follow track running off road; rough square piers with de
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