located in the outskirts of Phnom Penh, it’s an eye opening historical place though a depressing one. ticket is around 3$ and audio guide for same, 6$ total. once you start your tour, you will start imaging how all this genocide started by Khymer ruler against his own people. their are several sites which makes you go deep into thinking how can humans commit such atrocities and at one point you may just fail to imagine it in your head. a must see place in Phnom Penh.