Three sites used by Cambodia’s brutal Khmer Rouge regime as torture and execution sites 50 years ago have been added by UNESCO to its World Heritage List. The three locations were inscribed to the list by the United Nations cultural agency Friday during the 47th Session of the World Heritage Committee in Paris. The inscription coincided with the 50th anniversary of the rise to power by the communist Khmer Rouge government, which caused the deaths of an estimated 1.7 million Cambodians in the 1970s. UNESCO heritage sites are considered important to humanity and include the Great Wall of China, the Pyramids of Giza, the Taj Mahal and Cambodia’s Angkor complex.