Fodor's Expert Review Tuol Sleng Genocide Museum
This museum is a horrific reminder of the cruelty of which humans are capable. Once a neighborhood school, the building was seized by Pol Pot's Khmer Rouge and turned into a prison and interrogation center, the dreaded S-21. During the prison's four years of operation, some 14,000 Cambodians were tortured here; most were then taken to the infamous Killing Fields for execution. The four school buildings that made up S-21 have been left largely as they were when the Khmer Rouge left in January 1979. The prison kept extensive records and photos of the victims, and many of the documents are on display. Particularly chilling are the representations of torture scenes painted by S-21 survivor Vann Nath. Locals generally reveal they have never set foot here.