A semi circular buried bunker with four gun ports just showing above the surface.

Coordinates:

• Decimal degrees: -33.79328 (Latitude) 18.36794 (Longitude)
• Degrees, Minutes & Seconds: S33 47 35 (Latitude) E18 22 04 (Longitude)
• GPS: S 33 47.597 (Latitude) E 18 22.076 (Longitude)
• UTM: 34S 256315 (X) 6257650 (Y)
• Above sea level: 49 ft / 15 m

... also on Robben Island.

Sources:

• University of Cape Town. 2001. Phase 1 Archaeological assessment of Robben Island world heritage site. Rondebosch: Archaeology Contracts Office, Department of Archaeology.