The cave stream Lod Yai, Kanchanaburi province, located in the Rattanakosin national celebration. Look like natural stone bridge. With a height of about 50-60 meters from the water flowing all year round phroi Lam action. There is a large cavity cave where the sun shines into the cave to be careful. Make the inside light and was based upon the cave floor. In addition, the area of one side of the cave walls are colored images, the serpent that Karen is believed to the habitation of serpent.