Drive from Bangor near Belfast along the A2 coast road to the seaside town of Ballywater, head west to Greyabbey, then south on the A20 to Portaferry. Take the car ferry over Strangford Lough to Downpatrick to visit St Patrick’s grave on Cathedral Hill.
Drive through Clough and on to Newcastle where the Mournes ‘sweep down to the sea’, then on to the fishing port of Kilkeel. Follow the A2 along the coast to Rostrevor, Warrenpoint and along to Newry. From Newry, travel south toward Dublin, through Dundalk and stopping off at Drogheda to see the prehistoric tombs at Newgrange, Knowth and Dowth. You can see where St Patrick lit the first paschal fire at Slane before returning on to Dublin.