IChurch of St Melangell In the upper part of Cwm Pennant, close to the confluence of Cwm Nant-ewyn. Preaching cross shaft in churchyard, reused as sundial pillar. Stone churchyard wall with lychgate and stile.
IChurch of St Michael Sited in large churchyard, with a few chest tombs, uphill from road junction in middle of the settlement.
IChurch of St Silin At centre of Llansilin village. Stone-walled churchyard with iron gates at west to High Street; prominent War Memorial of Celtic Cross form; sundial.
IChurch of St. Mary Magdalene Central position in small hamlet of Bleddfa. Nearly circular churchyard set back from triangular green on north side of A488. Ancient site, traditionally founded by the Irish saint Brendan in C6.
ICiliau Situated on a rock plateau above the east bank of the River Wye, 0.8km SE of Erwood.
ILeighton Hall Located approximately 1.4km S of Leighton church. The Hall is reached by private road on the E side of the B4388 Buttington to Forden road, and is set in landscaped gardens.
ILeighton Hall Tower Located approximately 1.4km S of Leighton church. The Tower is SE of Leighton Hall, reached by short private road E of B4388. A second (currently disused) service road leads to SW side of the Tower.
ILlandrinio Bridge Partly within the community area of Bausley with Crigion. The bridge provides a crossing for the Llanfyllin to Shrewsbury Road over the River Severn, superceding a ford a little to the north.
IMaesyronnen United Reformed Chapel The chapel and adjoining cottage lie at the end of a lane off the road from the A.438 Hereford to Brecon Road to Ffynnon Gynnydd, near the top of a steep bank and overlooking the Cilcenni Dingle.
IMontgomery Castle Situated at the top of Castle Hill, reached by footpath from car park by Old Castle Farm.
INewton House Between the road and the River Usk; reached via drive to Golf Course.
IOld Gwernyfed Located on NW side of road from Talgarth to Felindre, and set within its own grounds at the end of an axial driveway from the entrance gates on the road. The former farm buildings lie immediately to
IPorth-Mawr Gatehouse Forward to the street and set into a long rubble crenellated wall now enclosing porth mawr house but formerly the castellated herbert family mansion called cwrt-y-carw. Gatehouse adjoins side of hous
IPowis Castle On a rock outcrop, in parkland to the S of the town.
IThe Tower At the S edge of Scethrog hamlet, bordering the River Usk, on a mound and surrounded by a vestigial moat within a stone walled garden. Reached off S side of A40.
ITheatre at Craig-y-nos The theatre is attached to the NW of the house with entrance from the corner of the front courtyard.
ITreberfydd (also known as Treberfedd) On rising ground above the S shore of Lake Llangorse, overlooking the Lake and Mynydd Troed, standing in a large garden and parkland reached by front and rear drives.
ITrefecca Fawr Located south of Trefeca hamlet, on a minor lane, approximately 100m from its junction with B.4560 Talgarth to Llangors road.
ITretower Castle Prominently sited SW of church on S side of Ty Llys farm, W of Tretower Court. Farm buildings are contained within the bailey walls
ITretower Court Approximately 150m S of the parish church on W side of a minor road between Tretower and A40
ITy Mawr Located on a platform site adjacent to the by-road leading SW off the B4345 to Berriew, S of Castle Caereinion.
IUsk Bridge Spanning River Usk, and linking Bridge Street with Watergate.
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