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 Tipperary, Classic vista of the Rock of Cashel, a spectacular group of Medieval buildings set on an outcrop of limestone in the Golden Vale.

Ireland, County Tipperary, Rear view of the Rock of Cashel, a spectacular group of Medieval buildings set on an outcrop of limestone in the Golden Vale.

England, Northumberland, Bamburgh Castle on rocky outcrop.

Italy, Valle d'Aosta, Bard, view of Bard Castle on outcrop.

Italy, Valle d'Aosta, Bard, view of Bard Castle on outcrop.

Italy, Valle d'Aosta, Saint Pierre, view of Saint Pierre Castle on outcrop.

Italy, Valle d'Aosta, Saint Pierre, view of Saint Pierre Castle on outcrop.

Norway, Svalbard, Longyearbyen,Valley side, Old coal mine and cable way.

Norway, Svalbard, Longyearbyen, Valley side, Church, Kirke, remains of original settlement at Longyearbyen, remains of colliery aerial cable way along valley side.

Norway, Svalbard, Longyearbyen.Svalbard Church, Kirke, remains of original settlement at Longyearbyen, remains of colliery aerial cable way along valley side.