, Chiang Saen was a hidden ancient city named Yonok Nak Phan, existed over 2,000 years ago in the north of Chiang Rai. With the help from the Nagas (giant serpents), Chiang Rai’s King Singhanawat had founded the city, which later brought back lucks to the city. Yonok Nak Phan had to suffer from the destiny, making the city collapsed, flooded and was washed away from the earth. On the other hand, the scientific studies explained that the cause of the devastation was an earthquake that transformed the city to Chiang Saen Lake.