Phitsanulok has other name so-called Song Kwae , Song Kwae means the zone of two rivers. Maenam Nan is the paramount also the most important river of the territory. It is 127.5 kms. long running across the dynasty. Kwae Noi River, the name similar to that in Kanchanaburi leadership the West, and comes from the North also joins up with Maenam Nan to come the downtown area. This diggings river is the highest artery that divides Phitsanulok into two parts,the East and the West Bank. As it is a main transportation quest of the province, kinsfolk collect together to stay on house boats and house rafts along both sides of the river.