Kanchanaburi, which has mostly mountainous terrain, covers an area of approximately 19,473 square kilometers and is the third largest province in Thailand after Chiang Mai and Nakhon Ratchasima. Situated approximately 129 kilometres west of Bangkok, Kanchanaburi shares a border with Myanmar to the west, Tak and Uthai Thani Provinces to the north, Suphan Buri and Nakhon Pathom Provinces to the east, and Ratchaburi Province to the south.