It was built in 1866 after King Norodom relocated the royal capital from Oudong. Located on the western banks of the Tonle Sap and Mekong River, the palace complex features stunning Khmer architecture, divided into 4 main compounds. The grounds of the Palace are also home to the Silver Pagoda, which received its name because its floor is made of 5,329 silver tiles. Learn about the Khmer kings, resident at all times, with the exception of the period when the Khmer Rouge took control in 1975. See gold and jeweled Buddha statues in the Silver Pagoda, and the Angkor Wat style Bell Tower.

Choeung Ek is the site of a former orchard and mass grave of victims of the Khmer Rouge - killed between 1975 and 1979 - about 17 kilometres south of Phnom Penh, Cambodia. It is the best-known of the sites known as The Killing Fields, where the Khmer Rouge regime executed over one million people between 1975 and 1979.

The Tuol Sleng Genocide Museum is a museum in Phnom Penh, the capital of Cambodia, chronicling the Cambodian genocide. The site is a former secondary school which was used as Security Prison 21 by the Khmer Rouge regime from its rise to power in 1975 to its fall in 1979.