- Category: Water Feature
- Type: Island
- Latitude/Longitude: 52°44'41"N 4°48'5"W
- Eastings/Northings: 210987, 320052
- OS Grid: SH109200
- Mapcode Local: GBR GPJF.TJX
- Mapcode Global: WH33Z.68RG
Location and coordinates are for the approximate centre of Maen Du within this administrative area.
Geographic features and populated places may cross administrative borders.