The most historical site present in The temple, Phnom Bakheng, which is situated in Angkor, Cambodia is in a form of a temple mountain which is a Hindu and Buddhist temple. It was built by the end of the 9th century during the reign of king Yasovarman (889-910) and is dedicated to Lord Shiva. It has become a popular tourist spot as it is located at the top of the hill, people enjoy the sunsets and bigger views of Angkor wat temple. Bakheng temple was built at least 2 centuries before the Angkor wat temple so it is considered the major and principal temple of the Angkor region. When king Yasovarman moved his court from the capital Hariharalayain the Roluos area in the southeast, the temple was the architectural centerpiece of the new capital Yashodharapura.

There was an inscription that was found at the Sdok Kak Thom temple in present-day Thailand, dated 1052 AD, states in Sanskrit, “When Sri Yasovardhana became king under the name of Yasovarman, the able Vamasiva continued as his guru. By the king's order, he set up a linga on Sri Yasodharagiri, a mountain equal in beauty to the king of mountains." It is believed by historians or scholars that this passage refers to the consecration of the Phnom Bakheng temple, a century and a half earlier approx.

This temple Phnom Bakheng is among the top three hilltop temples dedicated to Yasovarman’s reign in the Angkor area. There are two others namely Phnom Krom to the south near the Tonle Sap Lake, and Phnom Bok, northeast of the East Baray reservoir.