Nendrum Castle, Mahee Island, Killinchy, Co Down, BT23 6EP

Ruinous and partly overgrown remains of a tower house, probably built c.1570, set at the northern edge of Mahee Island, facing the causeway from Reagh Island, c.2.5 miles (as the crow flies) NE of the village of Killinchy. The ruins are three storeys in height and split stone rubble and boulders. The plan was probably originally rectangular, the remaining walls measuring roughly 13m by 6.5m. Very little survives of the NE wall save a corner section to the right, but much of the SW wall remains. The SW wall contains six openings of various sizes, with splayed reveals, with a two openings to the ground floor, three to the first floor and one to the left on the second floor. The opening to the left on the ground floor appears to have been a doorway. Above one of the openings on the first floor there are a series of niches which once held the second floor joists. At ground level there are the remains of two rooms with barrel vaulting to that to the SW. The SE room continues through to a full width doorway on the SW (see above), but the NE end has fallen away. The first floor appears to have consisted of a single chamber. The remains of the stairway are to the S corner and the stairway itself can be seen rising through the thickness of the SE wall.