- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 51°55'49"N 3°10'55"W
- Eastings/Northings: 318814, 226434
- OS Grid: SO188264
- Mapcode Local: GBR YY.NK9P
- Mapcode Global: VH6C2.SQKY
Location and coordinates are for the approximate centre of Cwm Nant yr Ychen within this administrative area.
Geographic features and populated places may cross administrative borders.