Narrow Water Keep is located near Warrenpoint at the transition of the River Newry into the estuary Carlingford Lough. The location of the tower house was chosen wisely during its construction in 1568 to protect Newry from attacks from the sea. Already before (since 1210) there was a wooden fortification. In the course of the Irish rebellion, the original tower house was largely destroyed and restored after being handed over to the state in the 1950s.
The A2 leads directly past the Narrow Water Keep Towerhouse. From a small car park you reach the tower house, which you unfortunately cannot visit. This section of the road experienced a bloody massacre of British soldiers by the IRA during the Northern Ireland conflict.