Kbal Chhay Waterfall is a popular excursion for Khmers visiting Sihanoukville, as it was used as a major location for the filming of the popluar movie Pos Keng Kong (The Giant Snake; 2000), the most successful Cambodian-made film in the post-civil war era. The multiple falls are attractive, but not as spectacular or isolated as those near Krong Koh Kong. There is also alitter problem here that rather detracts from the natural beauty. Anyone who has seen or is planning to see the falls at Krong Koh Kong can probably give Kbal Chhay a miss.
Kbal Chhay waterfall is located in Khan Prey Nup, about 16 kilometers north of downtown Sihanoukville. To reach the site from Sihaboukville, take National Road 4 toward Phnom Penh. About 7 kilometers outside of town, there is a sign announcing the site. Turn left and go 9 kilometers along a trail. The water at Kbal Chhay comes from many sources along the mountain range, although only three of these sources are visible. The waterfall, which is 14 meters high, is at the point where those three sources join.
Kbal Chhay was discovered in 1960. Three years later, it was developed into a reservoir to supply clean water to the city of Sihanoukville. The reservoir construction, however, was interrupted due to civil war, and the site became a hide-out for the Khmer Rouge. In 1997, Kbal Chhay was marked for development, and a year later Kok An Company was awarded a contract to construct a road and develop the site for tourism.