SAM PAN BOK. Pong target area for the beauty Pho Sai district Ubonratchathani. sam pan bok is a magnificent underwater. To appear only in times of drought splendor only. Because during the flood season, the rock will be submerged underwater. The beauty of the stone, which was fine until the tide bite Sae dented. Seen as an artistic image there are different shapes out. Big some small what is a circular, oval, star and many more. But we can imagine a pool of more than 3,000, or 3 waves? Because there are more than 3,000 pools here have dubbed the "Grand Canyon of Thailand".