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, Bukhara, The arch in the Coronation Hall, in the Ark Fortress, Registan Square.

Uzbekistan, Khiva, Exterior detail of Tash Khauli, also known as Tosh Hovli, Ichan Kala.

Uzbekistan, Khiva, Exterior detail of Tash Khauli, also known as Tosh Hovli, Ichan Kala.

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

Uzbekistan, Khiva, Decorative ceiling of the Mosque in Kunya Ark, also known as Kohna Ark, 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.