Phanom Rung Historical Park
Situated on top of an extinct volcano at a height of 381m, Phanom Rung represents maybe the finest monument of the classical Angkor period which is situated in Thailand. It's full name 'Prasat hin Kaho Phanom Rung' is translatable to 'Palace of Stone on the Hill Rung'; 'Phnom Rung' in Khmer language means somewhat like 'broad hill/mountain'.
The nearest bigger city is the province capital Buriram in Isan, some 50km north, from which it is possible to visit Phanom Rung in a day-trip by public bus. Phanom Rung itself is located in a mountainous, forested area, surrounded by small villages.
In the not too far surroundings are also Prasat Muang Tam, Phluang and a bit further eastwards a third historical site to explore.