This museum was originally a high school in 1960 until it was taken over in 1975 by Pol Pot’s security forces and turned into a torture and interrogation centre. Most people held at this prison were eventually executed. Evidence has shown that over 17,000 people had been imprisoned there between 1975 and 1978, and out of these 17,000 only 7 are known to have survived. It was converted into a museum in 1979 after the Vietnamese invasion. It now houses photographic records of the victims of this torturous place. A very moving experience.