Tham Pla caves. are about 12 KM south of Mae Sai are a visit if you are in the area. It is a 2km walk from the main road get off buses at Ban Tham Pla. Unfortunately, the park has been allowed to become very run down but there are still interesting things to see. If you haven't got a torch (flashlight), needed as as there is no artificial lighting in the caves, you can buy one just before entering the cave to the right of thee temple. Watch out for the monkeys which sometimes steal bags from you. Free entry, Aug 2014. There are other caves nearby signposted on the road to the Tham Pla caves. Free.