The Khmer Rouge Regime massacred over one million people during their reign of terror between 1975-1979. Some estimates are as high as 2 ½ million killed. At Choeung Ek, which is about 11 miles from Phnom Penh, is the infamous Killing Fields. Nearly 9,000 skeletal remains have been uncovered in shallow mound graves. Reportedly, it is not uncommon for bones and clothes to emerge from the ground after a heavy rain. In the center of the memorial park is a tall Buddhist shrine called a stupa. It contains over 5,000 human skulls. They are clearly visible through the glass windows. It is an eerie and sickening experience but a historical education.