Preah Vihear Temple is an UNESCO World Heritage site. This medieval religious complex is also known as Sreysikharesvara or "The power of the mountain". The construction of the temple started in the late 9th century with latter structures added through the 12th century. Initially it was devoted to Hindu god Shiva, but with decline of Hinduism in the region it came in possession of the Buddhist monks.
Location: Preah Vihear Province Map
Caution: Thai- Cambodian border have seen violence and many regions including Preah Vihear Temple are bitterly disputed.