Phayao is a city in northern Thailand, capital of Phayao Province. For administrative purposes the city is divided into 15 sub-districts, which are further subdivided into 172 administrative villages.The town is on the shore of the Phayao Lake. It dates back to the semi-independent city-state, founded between 900 and 1,000 years ago.
As of 2005 Phayao had a population of 19,118. Phayao lies 726 km north of Bangkok.
Wikipedia https://en.wikipedia.org/wiki/Phayao
Coordinates 19°9'59.872" N 99°54'6.992" E