Ireland, County Kerry, Killarney, Ross Castle, 15th-century tower house and keep on the edge of Lough Leane in Killarney National Park, the ancestral home of the Clan O'Donoghue.

Spain, Castile, Segovia, Puerta de San Andrés or St Andrew's Gate, part of the city's medieval defensive fortifications.

Ireland, County Carlow, Clonegal, Huntington Castle.

Ireland, County Carlow, Carlow Castle one of the most important Anglo-Norman castles in Ireland thought to have been built by William de Marshal between 1207 and 1213).

Ireland, County Waterford, Dungarvan Castle, restored barracks in the courtyard.

Ireland, County Waterford, Dungarvan Castle, entrance gate leading in to the courtyard.

Ireland, County Waterford, Waterford city, Reginalds Tower which was built by the Anglo-Normans after their conquest of Waterford, replacing an earlier Viking fortification.

Ireland, County Waterford, Waterford city, Reginalds Tower which was built by the Anglo-Normans after their conquest of Waterford, replacing an earlier Viking fortification.

Ireland, County Laois, Rock of Dunamase, Ruin of the Barbican entrance gate.

Ireland, County Laois, Rock of Dunamase, Ruin of the Barbican entrance gate.

Ireland, County .Westmeath, Moate, Dun na Si Heritage Park, Reconstruction of a Ring Fort.

Ireland, County Mayo, Killala, Killala Round Tower.