Namtok La-ong Rung (Rainbow Waterfall) 

This is situated on the boundary between Amphoe Than To and Amphoe Betong, about 90 kilometres on the Yala-Betong road from Amphoe Muang. Turn right onto a dirt road at about 40 kilometres before reaching Amphoe Betong, for about 100 metres. The slippery trek leads along the stream from the waterfall calls for precaution. During the rainy season, the waterfall has the effect of the rainbow, hence the name.