- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 52°52'14"N 3°33'14"W
- Eastings/Northings: 295500, 331500
- OS Grid: SH955315
- Mapcode Local: GBR 6G.R16K
- Mapcode Global: WH67D.C3WH
Location and coordinates are for the approximate centre of Nant Rhiw-y-llyn within this administrative area.
Geographic features and populated places may cross administrative borders.