- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 52°13'6"N 3°13'25"W
- Eastings/Northings: 316500, 258500
- OS Grid: SO165585
- Mapcode Local: GBR YX.2711
- Mapcode Global: VH69Q.2HMR
Location and coordinates are for the approximate centre of Llynheilyn within this administrative area.
Geographic features and populated places may cross administrative borders.