structural:reformatting, structural:expansion
Museums

The Tuol Sleng Museum of Genocide is a former high school building, which was transformed into a torture, interrogation and execution center between 1976 and 1979. The Khmer Rouge called the center S-21. Of the estimated 15,000 to 30,000 prisoners, only seven prisoners survived. The Khmer Rouge photographed the vast majority of the inmates and left a photographic archive, which enables visitors to see almost 6,000 S-21 portraits on the walls. Visitors can also learn how the inmates were tortured from the equipment and facilities exhibited in the buildings.

The Choeung Ek Killing Fields are located about 15 kilometers outside of Phnom Penh. Most of the prisoners who were held captive at S-21 were taken to the fields to be executed and deposited in one of the approximately 129 mass graves. It is estimated that the graves contain the remains of over 20,000 victims. After the discovery of the site in 1979, the Vietnamese transformed the site into a memorial and stored skulls and bones in an open-walled wooden memorial pavilion. Eventually, these remains were showcased in the memorial's centerpiece stupa, or Buddhist shrine.