Khao Phra Wihan National Park () is a protected natural area in Sisaket Province, Thailand, that contains numerous ruins of the 11th century Khmer Empire. The park lies south of the town of Sisaket, at the end of Thai highway 221. Sited on a red stone cliff that is part of the Dangrek mountain range on the southern edge of the Khorat Plateau, it abuts the international border between Thailand's Sisaket Province and Cambodia's Preah Vihear Province. The name of the cliff in the Royal Thai General System of Transcription is Pha Mo I Daeng (). The park was established on 20 March 1998, with an area of 81,250 rai ~ Gateway to Prasat Khao Phra Wihan The park atop Pha Mo I Daeng is the Thai gateway to ruins associated with the temple of Prasat Preah Vihear, and is generally open to everyone upon payment of entrance fees. When relations between the two countries are normal, the temple ruins are also accessible from the Thai side. Both sides charge additional entrance fees for such access, but Cambodia does not require visas. Access from the Cambodian side is to the temple ruins only. The International Court of Justice awarded the temple ruins to Cambodia in 1962, but these are located in an area of 4.6 km² that Thailand still claims. Nevertheless, in 2008 the World Heritage Committee's 32nd Session listed the Temple of Preah Vihear as a UNESCO World Heritage Site, which prompted an armed dispute. For visitors' safety, areas with landmines are clearly marked. Dispute In 2007, Cambodia proposed to the World Heritage Committee's Thirty-First Session that Preah Vihear Sanctuary be listed as a UNESCO World Heritage Site. As Cambodia and Thailand had not resolved border issues concerning the site, the Committee postponed consideration to its 32nd session, and asked Cambodia to provide a complete management plan for the area. Early in January 2008, Cambodia invited Thai experts to participate in a site survey of the Buffer Zone, and then to Siem Reap and Phnom Penh to collaborate with a team of international experts in the making of a plan for the area in Cambodian territory. Thai experts found "unacceptable scientific inaccuracies" in documents presented, dissociated themselves from the group, and then published in rebuttal their own Management Plan for Preah Vihear Mountain and Its Setting. A PDF English language version of the Plan has been released. Following a