Retaining wall with small jetty in Menai Strait

Sea wall and terrace with 3 semicircular bastions, the central supporting a flagspole. Walls of roughly coursed and squared masonry with flat slab coping, plain stone band on seaward side. Between the bastions are two rectangular projections with Gothick arches below opening onto Menai Strait. To the S is a covered dock or plunge bath with brick arch ceiling, reached via stone steps and brick tunnel-vaulted passage. To the N is narrrow jetty projecting into Menai Strait (part of which has been washed away), reached through a subterranean room, through a Gothick arch flanked by 2 Gothick windows, the one to S being blind. Room with 2 bay cross vault in brick and stone bench along rear wall. Fireplace with massive squared stone lintel. At the S end of the sea wall is a curving harbour wall and slipway with a later parapet and a battlemented bastion set behind. At the N end of the harbour is a concrete swimming pool dating from the 1950s, probably utilising some of the original harbour wall, and a small stone building.