Bwlch Trewyn

Bwlch Trewyn is a hamlet in the ancient parish of Cwmyoy, on the River Monnow, 5½ miles north of Abergavenny. Along with the hamlet of Fwthog in the same parish it forms a detached part of Herefordshire, locally situate in Monmouthshire.

In the hamlet of Bwlch Trewyn stands Trewyn House, a noble mansion, built in 1695 and now a Grade II* listed building.

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