Poland, Auschwitz-Birkenau State Museum, Birkenau Concentration Camp, Guard tower with ruins of former accommodation blocks surrounded by barbed wire fencing.

Poland, Auschwitz-Birkenau State Museum, Birkenau Concentration Camp, Typical railway transport box car that brought Jews to the camp.

Poland, Auschwitz-Birkenau State Museum, Birkenau Concentration Camp, Typical railway transport box car that brought Jews to the camp.

Poland, Auschwitz-Birkenau State Museum, Birkenau Concentration Camp, Close up of barbed wire fencing surrounding ruins of former accommodation blocks.

Cambodia, Phnom Penh, Tour group looking at victims' portraits, Toul Sleng Genocide Museum S-21. Toul Sleng was a high school, taken over by the Khmer Rouge and turned into a prison, where people were...

Cambodia, Phnom Penh, Western tourists lower legs and feet visible beneath a display of victims' photo portraits at Toul Sleng Genocide Museum S-21. Toul Sleng was a high school, taken over by the Khm...

Cambodia, Phnom Penh, Two victims' photos at Toul Sleng Genocide Museum Security Prison-21 S-21. Toul Sleng was a high school, taken over by the Khmer Rouge and turned into a prison, where people were...

Cambodia, Phnom Penh, Painting by Vann Nath of a prisoner being beaten by a Khmer Rouge cadre with an iron bar at the killing field of Choeung Ek.

Skulls at the Choeung Ek Memorial stupa for victims of the killing fields of the Khmer Rouge

Cambodia, Phnom Penh, Skulls at the Choeung Ek Memorial stupa for victims of the killing fields of the Khmer Rouge.

Cambodia, Phnom Penh, Victims' photos, including one of a sad mother and probably her dead baby, at Toul Sleng Genocide Museum Security Prison-21 S-21. Toul Sleng was a high school, taken over by the...

Cambodia, Phnom Penh, Old, grainy victims' photo at Toul Sleng Genocide Museum Security Prison-21 S-21. Toul Sleng was a high school, taken over by the Khmer Rouge and turned into a prison, where peop...