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.

Turkey, Ayasuluk Castle on Ayasuluk Hill behind the ruins of Saint John’s Basilica, Selcuk, near Ephesus.

Poland, Krakow, Wawel Hill, Wawel Castle, View of Wawel Cathedral and Wawel Castle from The Sandomierska Tower.

Poland, Krakow, Wawel Hill, Wawel Castle, View of an artillery tower from The Sandomierska Tower.

Poland, Krakow, Wawel Hill, Wawel Castle, The Sandomierska Tower.

Poland, Krakow, Wawel Hill, Wawel Castle, An artillery tower view through gateway.

Poland, Krakow, Wawel Hill, Wawel Castle, Tiered arcades in the courtyard.

Poland, Warsaw, Plac Zamkowy or Castle Square seen from St Anne's Church Viewing Tower.