Toul Sleng

It was time to learn about the horros this lovely country endured under the time of Pol Pot.

from Wikipedia

Formerly the Tuol Svay Prey High School[1], named after a Royal ancestor of King Norodom Sihanouk, the five buildings of the complex were converted in August 1975, four months after the Khmer Rouge won the civil war[2], into a prison and interrogation centre. The Khmer Rouge renamed the complex "Security Prison 21" (S-21) and construction began to adapt the prison to the inmates: the buildings were enclosed in electrified barbed wire, the classrooms converted into tiny prison and torture chambers, and all windows were covered with iron bars and barbed wire to prevent escapes.
From 1975 to 1979, an estimated 17,000 people were imprisoned at Tuol Sleng (some estimates suggest a number as high as 20,000, though the real number is unknown). The prisoners were selected from all around the country, and usually were former Khmer Rouge members and soldiers, accused of betraying the party or revolution.[1] Those arrested included some of the highest ranking communist politicians such as Khoy Thoun, Vorn Vet and Hu Nim. Although the official reason for their arrest was "espionage," these men may have been viewed by Khmer Rouge leader Pol Pot as potential leaders of a coup against him. Prisoners' families were often brought en masse to be interrogated and later murdered at the Choeung Ek extermination centre.