The killing fields of Choeung Ek is situated 15 kilometers south-west of Phnom Penh and made famous by the film of the same name "Killing Field". It was a place where more than 17,000 civilians were killed and buried in mass graves; many of them were transported here after detention and torture in Toul Sleng. This place is a chilling reminder of the brutalities of the genocidal Khmer Rouge regime.