Scotland, Outer Hebrides, Isle of Barra, Castle Bay, Kisimul castle seen from the shore with moored boats in the foreground.

Scotland, Outer Hebrides, Isle of Barra, Castle Bay, Kisimul castle seen from the shore with moored boats in the foreground.

Ireland, County Sligo, Markree Castle grounds near Collooney, trees and grass covered in snow and hoar frost in mid winter.

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.

Spain, Castille Leon, Segovia, Alcazar Castle.

England, Berkshire, Windor, Tourists on the Long walk pathway leading to Castle gardens.

England, Warwickshire, Warwick, Fourteenth century castle overlooking the River Avon.

Fortification built on the end of Hurst Spit at the narrowest point of the Solent, opposite the Isle of Wight guarding the approaches to Southampton Port and Portsmouth harbour. First fort completed i...

Spain, Balearic Islands, Majorca, Palma de Mallorca, Castle Bellver with wedding party taking photos on the steps.