Tuol Sleng Genocide Museum - torture and execution center established by the Khmer Rouge, now a museum
Tuol Sleng Genocide Museum - Wikipedia
https://en.wikipedia.org/wiki/Tuol_Sleng_Genocide_Museum
https://en.wikipedia.org/wiki/Tuol_Sleng_Genocide_Museum
Number of inmates: 18,145 prisoners, probably more
Killed: 18,133
Every statistic about the Cambodian Genocide is staggering.
Same and went to the killing field outside the city later on. The driver cried when talking about the family members he lost. Most harrowing day of my life, totally redefined the lower limit of "how badly things can go wrong".
There's also https://en.wikipedia.org/wiki/Killing_caves_of_Phnom_Sampeau
Near Battambang. The caves have a skylight and victims were either killed, usually with a knife or blow to the head, and thrown in, or thrown in alive.