Nam Tok Heo Narok (น้ำตกเหวนรก) This large size waterfall located in the vicinity of Amphoe Pak Phli is under the responsibility of Khao Yai National Park Protection Center. It is accessible via Bangkok Don Muang-Hin Kong ; then branch off to the right for 22 kilometers passing Nakhon Nayok township ; then branch off again on the left through Highway No. 33 to Noen Hom Intersection. Or from Bangkok one can go to Rangsit and go by an old road to the Nakhon Nayok-Noen Hom intersection. Then one enters Highway no. 3077 to Nam Tok Heo Narok. The waterfall cascades from a 200 meters cliff.