- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 52°51'49"N 4°0'51"W
- Eastings/Northings: 264500, 331500
- OS Grid: SH645315
- Mapcode Local: GBR 5V.RPC7
- Mapcode Global: WH561.98QT
Location and coordinates are for the approximate centre of Llyn Cwm Bychan within this administrative area.
Geographic features and populated places may cross administrative borders.