Topography[edit]
Phitsanulok is primarily flat lands with some hills.[2] The eastern portion of the city has some wooded area.[2] The city is situated in the Nan Basin, which is part of the Chao Phraya Watershed.[3] Phitsanulok is sometimes called Song Kwae, the city of two rivers, an ancient name dating to a time centuries ago when the Nan and Khwae Noi Rivers met near the city. Today, only the Nan River flows through Phitsanulok.