The natural harbours of Foyle and Carlingford have attracted invaders for centuries, each successive wave reinforcing their hold by constructing fortifications – the earthworks of the Celt, Norman castles, town walls and sea defences.
The natural harbours of Foyle and Carlingford have attracted invaders for centuries, each successive wave reinforcing their hold by constructing fortifications – the earthworks of the Celt, Norman castles, town walls and sea defences.