- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 52°50'15"N 3°27'11"W
- Eastings/Northings: 302211, 327668
- OS Grid: SJ022276
- Mapcode Local: GBR 6L.T7PC
- Mapcode Global: WH67F.XYT0
Location and coordinates are for the approximate centre of Cwm Nantewyn within this administrative area.
Geographic features and populated places may cross administrative borders.