Kanchanaburi The mountainous province of Kanchanaburi, Thailand’s third largest, covers some 19,473 sq kms., and borders Myanmar (Burmar) to the west of Bangkok. The compact provincial capital, some 130 km or a comfortable two-hour drive from Bangkok, is both the site of the world-famous “Bridge Over the River Kwai”, immortalized in books and movies, as well as the gateway to a region of rugged natural beauty. Mountains characterize the countryside beyond the provicial capital and fertile river valleys where a labyrinth of damaged reservoirs provide further scenic elements to the province’s natural beauty.