Portland Breakwater Fort

Portland Breakwater Fort stands as a circular stone fortification positioned on the outer breakwater of Portland Harbour, featuring thick granite walls and gun emplacements designed to withstand naval bombardment while providing commanding views over the surrounding waters.

Constructed between 1868 and 1875 by Captain E. H. Steward of the Royal Engineers, the fort originally housed seven 12.5-inch RML cannons and served as a crucial defensive position protecting Portland Harbour until its official decommissioning in 1956.

Despite its derelict condition, the fort maintains cultural importance as a Grade II listed building since 1978, attracting interest from heritage organizations and local arts initiatives, including a proposed conversion into an arts center by the Dorset Sculpture Trust.

The fort remains inaccessible to visitors due to safety concerns and its deteriorated state, though it can be viewed from nearby coastal areas or by boat, with restoration costs estimated at approximately £10 million for commercial use.

Remnants of cut-up 12-inch cannons from the fort's armament have been discovered floating in the surrounding waters, providing tangible evidence of the site's military past and the disposal methods used after decommissioning.