An estimated 1.4 million Cambodians were killed by the Khmer Rouge during 1975 to 1979. The executions took place in dozens of killing locations throughout the country, which have become known as Cambodia’s Killing Fields. The most notorious is Choeung Ek, 15kms from the center of Phnom Penh. Originally a 2ha orchard, and later, a section was used as a Chinese cemetery. An estimated 17,000 men, women and children were killed here usually by a blow to the head. Open daily from 7.30am to 5.30pm. Cost US$6 including a multi lingual audio pack.