Pha San is a symbolic building at the starting point of the Chao Phraya River, a new landmark in Pak Nam Pho. It is located at the Cape of Koh Yam, where the Ping and Nan rivers converge, marking the origin of the Chao Phraya River in Nakhon Sawan province. The name "Pha San" derives from the word "Phasarn," which means "to unite." However, "Pha San" specifically refers to bringing people together to create a harmony between individuals, the location, and the environment.