- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 51°35'10"N 3°44'10"W
- Eastings/Northings: 279800, 188921
- OS Grid: SS798889
- Mapcode Local: GBR H5.CBWX
- Mapcode Global: VH5H2.6D29
Location and coordinates are for the approximate centre of Cwm Rhys within this administrative area.
Geographic features and populated places may cross administrative borders.