The main attraction of the 130-sq-km Khao Phra Wihan National Park is one of the region's great Angkor-period monuments. Unfortunately Khao Phra Wihan ('Preah Vihear' in Khmer), which used to sit on the Thai side of the border, now comes under Cambodian rule, due largely to a campaign by the Cambodian government to make it a World Heritage site. Due to border tensions it is no longer accessible from the Thai side.
The large temple complex, which the Cambodian government chooses not to restore, towers 500m above the plains below, offering both evocative ruins and stunning views. It is not likely to be accessible from the Thai side for the foreseeable future.
