- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 51°43'27"N 3°7'9"W
- Eastings/Northings: 322777, 203436
- OS Grid: SO227034
- Mapcode Local: GBR J0.2J24
- Mapcode Global: VH6D2.WX7J
Location and coordinates are for the approximate centre of Cwm Nant-y-Groes within this administrative area.
Geographic features and populated places may cross administrative borders.