- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 51°34'3"N 3°37'52"W
- Eastings/Northings: 287039, 186659
- OS Grid: SS870866
- Mapcode Local: GBR HB.DFBB
- Mapcode Global: VH5H4.0VPQ
Location and coordinates are for the approximate centre of Cwm Nant-Gwyn within this administrative area.
Geographic features and populated places may cross administrative borders.