Just 17 kilometres south of the capital Phnom Penh lies the former orchard field of Choeung Ek, site of mass graves and mass executions during the reign of terror of the Khmer Rouge. People were brought to the site on mass between 1975 and 1979 and bludgeoned to death in order to safe bullets.
It is the best known of the sites labelled the killing fields and it is estimated that during their reign the Khmer Rouge executed over a million of their own people.
Today, Choeung Ek is a memorial, marked by a Buddhist stupa. The stupa has acrylic glass sides and is filled with more than 5,000 human skulls.