Ayutthaya: One Square Mile of Thailand
Some 70km north of the modern capital Bangkok, Ayutthaya is the ancient heart of this Asian nation.
Built on canals and resplendent with temples, it was the seat of a major empire. But after war with Burma in the 17th Century, it was destroyed and fell into ruin, leaving crumbling remains that have become a Unesco site.
Out of the ashes, however, a modern city has blossomed, becoming one of the main centres for Thailand's tech factories. Jonathan Head reports.