Wang Kelian is located at the border of Malaysia's Perlis state and Satun State of Thailand. A place where passport is not needed for both Malaysians and Thais. Local food products, clothes and everyday utensils can be bought at this place. Quite an interesting place to visit but traveling there is a bit tough as the road is winding and steep. More info and photos can be found at http://www.asiaexplorers.com/malaysia/wang_kelian.htm