- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 51°32'25"N 3°31'21"W
- Eastings/Northings: 294500, 183500
- OS Grid: SS945835
- Mapcode Local: GBR HG.G4NQ
- Mapcode Global: VH5HC.WJLX
Location and coordinates are for the approximate centre of Nant Crymlyn within this administrative area.
Geographic features and populated places may cross administrative borders.