The South West Dockyard Tower

The South West Dockyard Tower is a 19th-century island fort built from limestone ashlar, featuring a basement and two storeys. It has an irregular octagonal shape with steeply battered sides and heavy bull-nose moulding beneath a high parapet that includes gun loops on the east, southeast, and south sides. The windows are small and serve as gun loops, having camber heads with raised shouldered surrounds and voussoirs. Above each window, there is a smaller horizontal opening with a thin raised surround for smoke ventilation.

On the east side, there is a recessed parabolic arch that breaks the cornice, with rusticated voussoirs above. To the left on the lower floor, there is an iron door set in a granite rusticated frame, featuring a keystone inscribed with 'VR 1851'. To the right of the door is a window, with a similar window above it, both having horizontal vents above. An iron hoist bracket is located between the floors. The northeast angle is broad and windowless, while the southeast angle is narrower and has two square gun-ports. The south side mirrors the east side, featuring a parabolic arched recess with two horizontal gun ports. The north side, west side, and southwest angle are all narrower, each with a window and vent on both floors. The west side is partially obscured by an affixed navigation marker. The tower is also designated as a Scheduled Ancient Monument.