- Category: Water Feature
- Type: Island
- Latitude/Longitude: 52°1'28"N 4°53'29"W
- Eastings/Northings: 201711, 240183
- OS Grid: SN017401
- Mapcode Local: GBR CP.GMB2
- Mapcode Global: VH1QH.5CCV
Location and coordinates are for the approximate centre of Carreg Syn within this administrative area.
Geographic features and populated places may cross administrative borders.