- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 51°43'25"N 3°5'20"W
- Eastings/Northings: 324884, 203332
- OS Grid: SO248033
- Mapcode Local: GBR J1.2RQ2
- Mapcode Global: VH79K.DXWZ
Location and coordinates are for the approximate centre of Cwm Byrgwm within this administrative area.
Geographic features and populated places may cross administrative borders.