KHAO YAI is Khao Yai National Park or Khaoyai is a national park in Thailand. It lies largely in Nakhon Ratchasima Province (Khorat), but also includes parts of Saraburi, Prachinburi and Nakhon Nayok provinces. It was the country's first national park, established on September 18, 1962. A major role in its establishment was done by Boonsong Lekakul, one of the 20th century's most famous conservationists in Thailand.The park is the second largest in Thailand. It covers an area of 2,168 square kilometers, including evergreen forests and grasslands. Its altitude mostly ranges from 400 to 1000 m above sea level. There are 3,000 species of plants, 320 species of birds and 67 species of mammals, including Asiatic black bears, Asian elephants, gaur, tigers, gibbons, Indian sambar deer, Indian muntjac, dholes, and wild pigs. Its waterfalls include the 80 metre Heo Narok, and Haeo Suwat made famous from the film The Beach. Namtok Sarika is popular with the Thais. Recent wildlife studie...