evidence: Three Pagodas Pass (22) The Three Pagodas Pass forms the borderline between the Siam Kingdom at Kanchanaburi Province and Burma at Tavoy. The pass is named after the three pagodas standing there side by side, one on Thai boundary, the other two on the borderline and within the Burmese boundary respectively. [...] For centuries, the Burmese troops entered Siam through the Three Pagodas Pass to make wars with Ayutthaya.