evidence: Named after the magnificent 11th century Khmer sanctuary known to Cambodians as Preah Vihear, Thailand’s Khao Phra Wihan National Park covers a forested escarpment with soaring views into remote Northern Cambodia. At the time of writing, the ruins remain off limits from the Thai side, but you can get enticingly close. Built in dramatic fashion to honour the Hindu god Shiva some 1,100 years ago, Prasat Khao Phra Wihan (also spelt Viharn; we’re using the Thai name for this listing) is situated at the crest of a rugged 500-metre-high slope amid the Dandrek mountains. A half-kilometre west of the Cambodian-controlled ruins, Pha Mo E Daeng cliff is part of Thailand. When drawing up borders between French Indochina (including Cambodia) and independent Siam (now Thailand) in 1907, the French mappers diverged briefly north of the agreed-upon watershed border demarcation in a lasso of the pen that put Khao Phra Wihan on French land. The Thais remained silent about this until the mid-20th century, when the issue was resolved by a 1962 International Court of Justice ruling that granted the site to Cambodia.