Spain, Castile and Leon, Avila, City walls with the circular Avila Cathedral built into the walls that were built from 1090 onwards and are among the best-preserved and most complete in Europe.

Spain, Castile and Leon, Avila, The Puerta de San Vicente or Gate of St Vincent is a monumental gate with very strong turrets flanking the entrance, it is part of the city walls that were built from 1...

Spain, Castile and Leon, Avila, The Puerta de San Vicente or Gate of St Vincent is a monumental gate with very strong turrets flanking the entrance, it is part of the city walls that were built from 1...

Spain, Castile and Leon, Avila, The Puerta de San Vicente or Gate of St Vincent is a monumental gate with very strong turrets flanking the entrance, it is part of the city walls that were built from 1...

Spain, Castile and Leon, Avila, The Puerta de San Vicente or Gate of St Vincent is a monumental gate with very strong turrets flanking the entrance, it is part of the city walls that were built from 1...

Spain, Castile and Leon, Avila, The Puerta de San Vicente or Gate of St Vincent is a monumental gate with very strong turrets flanking the entrance, it is part of the city walls that were built from 1...

Republic of Ireland, County Clare, Bunratty Castle, a large 15th-century tower house built by the MacNamara family around 1425.

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

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.