Crom Castle (Irish: Caisleán na Croime) is a country house on the shores of Upper Lough Erne in County Fermanagh, Northern Ireland, the seat of the Earls Erne. Standing within the 1,900-acre (7.7 km2) Crom Estate,[1] and within a formal garden, the castle is built in stone. A central battlemented tower includes the main entrance, and there are also smaller towers to one side. It stands apart from the ruins of Old Crom Castle, of which two towers, some walls, and a ha-ha survive, and near them two ancient yew trees, believed to be at least 800 years old.