- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 53°1'0"N 4°0'23"W
- Eastings/Northings: 265500, 348500
- OS Grid: SH655485
- Mapcode Local: GBR 5V.FZ4Z
- Mapcode Global: WH558.FFDK
Location and coordinates are for the approximate centre of Llyn yr Adar within this administrative area.
Geographic features and populated places may cross administrative borders.