Oh so this is taking place in the North..I like Chiangmai and the northern cultures heheSince nobody's posting about Wiang Kum Kam itself yet, here's a copy-paste from google lol.
Wiang Kum Kam is an historic settlement and archaeological site along the Ping River, which was built by King Mangrai the Great as his capital before he moved it to Chiang Mai. It was flooded and abandoned more than 700 years ago; that move became more understandable in 2005, when the ancient city was flooded three separate times as the river overflowed its banks in that area of Chiang Mai.
About King Mangrai:
Mangrai was the 25th king of Ngoenyang (an early kingdom of the Northern Thai people from the 7th through 13th centuries AD) and the first king of Lanna (an Indianized state centered in present-day Northern Thailand from the 13th to 18th centuries). He established a new city, Chiang Mai, as the capital of the Lanna Kingdom (1296–1558). Lan Na emerged strong enough in the 15th century to rival the Ayutthaya Kingdom, with whom wars were fought.