The original ancestral home of the O'Cahan Clan, Dungiven Castle is now a boutique hotel popular with wedding couples. Tucked at the foot of Benbradagh Mountain, the castle makes a good home base for exploring Northern Ireland.

Castles—in various states of repair—dot the countryside of the Irish Isles. Some remain private homes, some are open to the public, and some are mere ruins of what they once were. But all are worth a visit, located in some of Ireland's most breathtaking locations.