- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 52°36'30"N 3°41'37"W
- Eastings/Northings: 285414, 302553
- OS Grid: SH854025
- Mapcode Local: GBR 98.8R8L
- Mapcode Global: WH68H.7PDJ
Location and coordinates are for the approximate centre of Cwm y Cylion within this administrative area.
Geographic features and populated places may cross administrative borders.