Depart from Bangkok 2.5 hours to visit the symbol important steel bridge historical landmarks and memorials in Kanchanaburi, "The Bridge Over the River Kwai" well known as death railway lines built in World War II. After war, the damaged bridge was renovated to memorize scary war and respect the pass away prisoners. Then continue to go Erawan National Park, The emerald green ponds has 7 tiers long by walking about 1.5 km. to first tier which the visitors are allowed to swim in the ponds are full with fishes all tiers