“Killing Field National Monument, Cambodia. The Killing Fields are a number of sites in Cambodia where large numbers of people were killed and buried by the communist Khmer Rouge regime. The memorial park at Choeung Ek has been built around the mass graves of many thousands of victims, most of whom were executed after they had been transported from the S-21 Prison in Phnom Penh. bones and clothing surface after heavy rainfalls due to the large number of bodies still buried in shallow mass graves. It is not uncommon to run across the bones or teeth of the victims scattered on the surface as one tours the memorial park. interest where tourists in asia. There are real human skull. n the historic building of human bones, skeleton, teeth in the cambodia. holocaust in cambodia during kymer rouge regime. Made of genocide and torture people. today, it is notorious national landmark for cambodian nation.