This half-day tour visits two of Phnom Penh's most important historical sites to help you understand Cambodia's past, especially the Khmer Rouge period from 1975 to 1979. Explore the Tuol Sleng Genocide Museum, formerly known as S-21 Prison, and Choeung Ek Killing Field, where many victims were taken after imprisonment. Although short, the tour offers important historical context on Cambodia from the French colonial period through the Khmer Rouge era to the present day. Learn how the country moved through conflict and eventually toward peace and development.