When you first get to The Grand Canyon you can't help but think of Sam Phan Bok in Ubon Ratchathani.Features of the Grand Canyon as a land of rocks and Dale. Caused by release of lifting crust and erosion of the Colorado River. Cause is 450 km long, 1600-metre high cliff located in Northwest Arizona. Country United States. But Features of the Sam Phan Bok is a large rock rapids in Mekong River Kaeng Hin it is a mountain in the Mekong River. When water flows through Water force erosion cycle, causing more than 3000 Fossa is a Fossa is called Sam Phan Bok which is visible during the dry season pages only during the month of December – may, when water from the basin sink is lost beneath the river.