Koh Ker was once an ancient capital of Cambodia, located in Srayong Cheung village, Srayong commune, Kulen district, about 49 kilometers west of the provincial town. The Koh Ker complex is on the Chhork Koki highland. It was built by King Jayavaraman IV3 (AD 928-942). Koh Ker temple is 35 meters high, and its design resembles a seven-stepped stupa. The temple faces west toward Angkor city. It was built to worship Treypuvanesvara, the god of happiness.

So far, 96 temples have been found in Koh Ker: Dav, Rumlum Bey, Bueng Veng, Trapiang Prey, Dey Chhnang, Srok Andoung, Ang Khna, Teuk Krahom, Darei Sar, Krarab, Banteay Pichoan, Kuk, Kmao, Thneung, Thom Balang, Rohal, Chamneh, Sampich, Trapiang Svay, Neang Kmao, Pram, Bat, Khner Chen, Klum, Chrab, Dangtung, Prang, Kampiang… . These temples were no longer standing, and some are buried in the ground. The followings are locations and descriptions of some of the Koh Ker temples: