Preah Vihear province, which borders Thailand and Laos to the north, is home to three of the most captivating temples of the Angkorian era: the Preah Vihear temple, the Koh Ker temple, and the Preah Khan Kampong Svay temple. It also houses communities of many ethnic hill tribes.
Koh Ker used to be a capital of the Khmer Emperor King Jayavarman IV who built this city in the year 921AD. Some parts of the temples are still hidden in the jungle and are not accessible. The Preah Vihear temple is most significant in this province.
A unique architectural complex of a series of sanctuaries linked by a system of pavements and staircases on an 800 metre long axis, this temple is an outstanding masterpiece of Khmer architecture, in terms of plan, decoration and relationship to the spectacular landscape environment.
Preah Khan Kampong Svay, also known as Prasat Bakan, is a complex of gigantic proportions located in the southwest corner of Preah Vihear province. It covers an area 4 times that of the Angkor Wat with a 3 km long Baray and a large number of towers or Prasats within the compound. Largely unknown and rarely visited, the temple had been very badly looted over the years.