Kilfeaghan Dolmen is a prehistoric portal tomb near Rostrevor, worth seeking out if you are exploring the Newry and Mourne side roads. Its huge granite capstone, estimated at around 35 tons, sits low and heavy over the chamber, making the monument feel more like a geological event than a built structure.
The site is not a polished visitor attraction, and that is part of its appeal. It is a quick stop, but a memorable one, especially if you are linking Newry with the coast around Warrenpoint, Rostrevor, or the lower Mournes.