I visited the Tuol Sleng Genocide Museum, and the bareness of the place allowed one’s imagination to go wild. The place used to be a high school until the Khmer Rouge regime (1975-1979) used it as the notorious Security Prison 21 (S-21).
The remnants of the Khmer Rouge regimes can still be felt and seen. A shadow of loss and fear hangs over Phnom Penh. A whole generation lost from the regime, people living to the ripe old age is in the far minority.