The Pai Memorial Bridge in Mae Hong Son Province dates from WW II and was built in 1942 by the Japanese in order to send their troops into Burma.

Though less well-known, it was at the time of equal strategic importance as  the infamous Bridge over the River Kwae in Kanchanaburi (fig.).

The bridge crosses the Pai River, just outside Pai's Amphur Meuang, but is in disuse ever since a new concrete bridge was built.

The bridge is today surrounded by paddy fields, which perhaps gives an idea of how important good roads and bridges still are in order to be able to cross this terrain.