- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 51°41'32"N 3°2'26"W
- Eastings/Northings: 328162, 199802
- OS Grid: ST281998
- Mapcode Local: GBR J3.4RVB
- Mapcode Global: VH79S.7QVG
Location and coordinates are for the approximate centre of Cwm Ynys-cou within this administrative area.
Geographic features and populated places may cross administrative borders.