Located 57 kilometres from the city of Zabol in Sistan va Baluchestan province, southeast Iran, Burnt City is one of the most important prehistoric sites of the country which was well developed during the third millennium BCE.
Spreading over a 300,000 hectare area, Burnt City was recently recognized as mainland-Iran’s largest prehistoric site. The city experienced four stages of civilization and was burnt down three times, which is why it was named ‘Burnt City.’ Discovery of hundreds of historical sites including 166 satellite villages together with large numbers of archaeological relics, skeletons, and ancient structures in the archaeological site of Burnt City makes it holder of an unparalleled record in the history of archaeological activities in Iran.
http://www.cais-soas.com/News/2006/December2006/11-12.htm
Divine intervention or lack of a fire department? Or maybe If at first you don't succeed, try, try again.