3 real castles, fortresses and walled cities in Northern Ireland — each mapped, dated and ready to explore.
Northern Ireland · 12th century
The best-preserved Norman castle in Ireland, guarding Belfast Lough
Northern Ireland · 15th century
Island stronghold of the Maguire chiefs, with a famous twin-turreted Watergate
Northern Ireland · 16th century
Dramatic clifftop ruin on the Antrim coast, seen in Game of Thrones