Uzbekistan, Bukhara, Outer walls of the Ark Fortress, Registan Square.

Uzbekistan, Bukhara, Outer walls of the Ark Fortress, Registan Square.

Uzbekistan, Bukhara, Entrance, outer walls and viewing gallery of the Ark Fortress, Registan Square.

Uzbekistan, Bukhara, Entrance, outer walls and viewing gallery of the Ark Fortress, Registan Square.

Uzbekistan, Bukhara, Entrance of the Ark Fortress, Registan Square.

Uzbekistan, Khiva, Kunya Ark, also known as Kohna Ark, housing Museum of Ancient Khorezm, Ichan Kala.

Uzbekistan, Khiva, An archway in the Mosque in Kunya Ark, also known as Kohna Ark, Ichan Kala.

Uzbekistam, Khorezm, Toprak Kala Fortress, Ellik Kala.

Uzbekistam, Khorezm, An ancient wall at Ayaz Kala Fortress 1, Ayaz Kala.

Uzbekistam, Khiva, Akshi Bobo, a tower of Kunya Ark, on left, and outer wall of Ichan Kala.

Uzbekistan, Khorezm, Ayaz Kala Fortress 2, photo taken from Ayaz Kala Fortress 1, Ayaz Kala.

Uzbekistan, Khorezm, Ayaz Kala Fortress 1 above and Ayaz Kala Fortress 2 below, Ayaz Kala.

Ireland, County Kerry, Killarney, Old Weir Bridge at the Meeting of the Waters where Killarney's 3 lakes meet.

Ireland, County Kerry, Killarney, Old Weir Bridge at the Meeting of the Waters where Killarney's 3 lakes meet.

Ireland, County Kerry, Killarney, Muckross Abbey, founded in 1448 as a Franciscan friary for the Observantine Franciscans by Donal McCarthy Mor.

Ireland, County Kerry, Killarney, Muckross Abbey, founded in 1448 as a Franciscan friary for the Observantine Franciscans by Donal McCarthy Mor.

Italy, Tuscany, Pisa, Volterra. Arco Etrusco stone archway dating from the 4th century BC.

Colombia, Kogi, Detail of Map Stone in the jungle.

Iceland, Snaefellsnes Peninsula National Park, Gatklettur stone arch The Hellnar Arch on the coast between Hellnar and Arnarstapi.

Iceland, Snaefellsnes Peninsula National Park, Gatklettur stone arch The Hellnar Arch on the coast between Hellnar and Arnarstapi.

Iceland, Snaefellsnes Peninsula National Park, Gatklettur stone arch The Hellnar Arch on the coast between Hellnar and Arnarstapi.

Spain, Castile, San Ildefonso, Palacio Real de la Granja de San Ildefenso dating from the 1720's, Los Banos de Diana or The Baths of Diana fountain. Drained of water.

Spain, Castile, San Ildefonso, Palacio Real de la Granja de San Ildefenso dating from the 1720's, Los Banos de Diana or The Baths of Diana fountain. Without water showing pipework.

Spain, Castile, San Ildefonso, Palacio Real de la Granja de San Ildefenso, Sphinx like statue in the gardens.