- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 52°34'5"N 3°57'22"W
- Eastings/Northings: 267500, 298500
- OS Grid: SN675985
- Mapcode Local: GBR 8Y.C6K1
- Mapcode Global: WH57F.6Q81
Location and coordinates are for the approximate centre of Nant Cwm-sylwi within this administrative area.
Geographic features and populated places may cross administrative borders.