Explore the waterfall of 1000 lingas carving Phnom Kulen National Park. One of the most noteworthy attractions of the park is the archaeological site of Kbal Spean. Located in the western region of the Phnom Kulen mountain range, Kbal Spean, alternatively referred to as the ‘River of a Thousand Lingas,’ is a carved sandstone riverbed that has numerous sculptures dating back to the 11th and 12th centuries.