Tat Ton waterfall is more or less a separate attraction; park authorities were not around to charge an entry fee on either of our visits. To find it, take Highway 2173 south out of Khong Chiam, as described above. At the blinking yellow light, follow the sign left towards Phibun Mangsahan rather than going right towards park headquarters. Not long after that, look for a brown cement sign that sneaks up on the right and says the name in Thai only. Turn in here and park, and then look for another Thai sign for the trail leading a few hundred metres to the waterfall.