Lam Sonthi is a city located in Thailand. While specific geographic details regarding its exact coordinates or administrative boundaries are not provided, it is situated within the country's national territory.
The region surrounding central Thailand is characterized by significant waterways, most notably the Pa Sak River. This river originates in the Phetchabun Mountains of Loei Province and flows through Phetchabun, Lopburi, and Saraburi provinces before joining the Chao Phraya River near Ayutthaya.