And another wonderful medieval town, Sighisoira in Transylvania, with a Dracula-style castle on top of the hill.

Pagan in Burma.  Another huge complex of temple ruins, spread over a wide area.

And while we're in Burma, the Shwedagon Pagoda in Rangoon....

The water wheels of Hama, in Syria.....

And still in Syria, the old city of Damascus....

Medain Saleh, off the beaten track in Saudi Arabia.  It was built by the Nabateans, who moved on to Petra when they had practiced their building skills here.

And nearby, the remains of the Turkish Hejaz railway. Put out of action by Lawrence in the First World War, anything too heavy to carry away has stood here gently rusting ever since.

Cairo - the medaeval Islamic City. Cairo has so many layers to it, but the most fascinating is the old Islamic walled City, with mosques, street traders and winding alleyways.

The 'fairy towers' in Cappadocia, central Turkey.  The towers are geological formations with caps of hard rock on top of soft, the dwellings have been hollowed out by refugees from various persecutions over the years.

Pingyao, China.  A town that was too poor to be knocked down and redeveloped, so today it has a complete city wall with watchtowers and lots of old-fashioned buildings.