IIY Lasynys Fawr including Brewhouse Block and Revettment Wall Located at the NE boundary of the community, set back some 250m from the road and sited against a rocky outcrop in the former flood plain; accessed from the road via an unmetalled track and set behind
IIYnysgain Fawr 750m approx. Down a lane which leaves the main Pwllheli Road on the edge of Llanystumdwy village, and close to the estuary of the River Dwfor.
IIYnys-wen Located on the north-east side of the A 4086 approximately 0.5km north-west of Llanberis; set directly onto the pavement behind a snecked rubblestone wall with C20 iron railings to top.
IIYnys Wye Farmhouse Situated about 1.3 km NW of Erwood, some 300m up lane from Erwood Bridge to the Twmpath.
IIYsgubor-fawr old farmhouse, with front garden walls Ysgubor-fawr lies at the E extremity of the community, reached from the road running N-S east of Bwlch Mawr. The old house lies in a separate enclosure to the NW of the new house.
IIYsgubor Gerrig The house stands back from the main Tremadoc to Caernarfon road, approximately 600m SW of Dolbenmaen church.
IIYsgubor-y-Coed Farmhouse To S of the city, reached by a farm road; approximately a mile off Upper Denbigh Road. Overlooking Vale of Clwyd and with farmyard to N.
IIYstradffin Situated E of the minor road leading to Llyn Brianne in the valley of the Afon Tywi, some 3.5km N of the centre of Rhandirmwyn.