An extensive forest area near the Thai-Malaysian border, declared a wildlife sanctuary in 1996, is located some 40 kms. south of Sungai Kolok via Route Nos. 4057 and 4062. It is rich in rare flora and fauna and contains a beautiful waterfall namely Namtok Sirindhorn. Visitors may take a one-day trip from Sungai Kolok to explore some parts of the forest which are open for nature study. Prior approval is necessary from the Headquarter of Bala-Hala Wildlife Sanctuary, P.O. Box 3, Amphoe Waeng Narathiwat Province.