A trip to this historic spot just 15 kilometers south of Phnom Penh is not for the faint of heart. Known as The Killing fields, some one million Cambodians were murdered here by the Khmer Rouge between 1975 and 1979. Nearly 9,000 bodies have been discovered—including former prisoners from Tuol Sleng.
A Buddhist stupa marks the memorial, and visitors can gaze through its clear walls at some 5,000 human skulls—all victims of the bloody regime. Dozens of mass graves are visible and it is not uncommon for travelers to find human bones, teeth or discarded clothing here—particularly after heavy rains—as a large number of people are still buried in shallow graves.