The Legend of the Naga (a supernatural being, taking the form of a very great snake or dragon) is a strong and sacred belief held by Thai and Lao people living along the Mekong River. According to a local myth the Mekong River, running from the south of China to Cambodia and Vietnam, came into existence through the passing by of a Naga. Many pay their respects to the river because they believe the Naga still rule in it, and locals hold an annual sacrifice for the Naga. Each ceremony depends on how each village earns its living from the Mekong River;
for instance, through fishing or transport. Local residents believe that the Naga can protect them from danger, so they are likely to make a sacrifice to Naga before taking a boat trip along the Mekong River.