Spain, Castile and Leon, Avila, Basilica de San Vicente. where according to legend, Christian martyrs Vicente, Sabina and Cristeta were martyred during the rule of the Roman Emperor Diocletian; their...

Ireland, County Clare, Rocky shoreline at Black Head with small stack of rocks constructed by tourists.

Ireland, County Clare, The Burren, Clint blocks of limestone and gryke or grike fissures leading to a rock boulder split in two by erosion.

Ireland, County Clare, The Burren, Clint blocks of limestone and gryke or grike fissures leading to a rock boulder split in two by erosion.

Ireland, County Clare, The Burren, A single weathered rock sits on typical limestone landscape.

Ireland, County Clare, The Burren, Poulnabrone Dolmen, the thin capstone sits on two 6 feet high portal stones, these stones created a chamber within which the dead were placed, the people buried here...

Ireland, County Clare, The Burren, Poulnabrone Dolmen, the thin capstone sits on two 6 feet high portal stones, these stones created a chamber within which the dead were placed, the people buried here...

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.

Ireland, County Cork, Bantry, Bantry House, the Rock Fountain surrounded by Wisteria.

Israel, Jerusalem, A view of the al-Ghawanima Minaret and the Dome of the Rock from the rampart above the Damascus Gate, looking across the Muslim Quarter of the Old City. The Old City of Jerusalem an...

Israel, Jerusalem, A view of the Dome of the Rock from the rampart above the Damascus Gate, looking across the Muslim Quarter of the Old City. The Old City of Jerusalem and its Walls is a UNESCO World...