Yet another poignant reminder of the brutal Khmer Rouge, Kamping Poy, also known as Killing Dam, stretches for some 5 miles (8 km) between two hills. Over 10,000 people, forced into slavery under the regime, lost their lives from malnutrition and execution, building what is now a largely worthless dam. It is believed that the dam was built in an  attempt to re-create the irrigation system of ancient Angkor,  although the scheme proved to be a failure. Today, there is nothing left of the sight except the sluice gates. The dam is now used by locals as a picnic spot. Visitors can take a boat, rowed by local boys, to the middle of the lake, but prices can often be exorbitant.