- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 52°55'11"N 3°53'52"W
- Eastings/Northings: 272500, 337500
- OS Grid: SH725375
- Mapcode Local: GBR 60.N1N9
- Mapcode Global: WH55Q.3W51
Location and coordinates are for the approximate centre of Nant Islyn within this administrative area.
Geographic features and populated places may cross administrative borders.