- Category: Water Feature
- Type: Island
- Latitude/Longitude: 50°35'45"N 4°49'33"W
- Eastings/Northings: 200100, 81160
- OS Grid: SX001811
- Mapcode Local: GBR ZV.GFPP
- Mapcode Global: FRA 07SH.FR5
Location and coordinates are for the approximate centre of Castle Rock within this administrative area.
Geographic features and populated places may cross administrative borders.