Locates at Khan Prey Nup in seven-Kilometer distance from the Sihanouk Ville Town, then turning left more nine-Kilometers by a red soil road. The waterfall of Kbal Chhay has many sources from the mountain rank at the seaside. The history of Kbal Chhay waterfall was found in 1960. Until 1963 Kbal Chhay arranged as the clean-water sources for providing to Sihanouk Ville, but the arrangement was failed became a hidden place for Khmer Rouge. In 1997, Kbal Chhay was changed to the developing zone. In 1998 Kbal Chhay was for bid by Kok An Company on constructing road and changing this site as tourist resort for local and international tourists. Nowadays, the Royal Government of Cambodia has changed this site as the clean-water sources so as to provide clean water to Sihanouk Ville.