Khao Yai   KHAHAO YAI is Thailand’s oldest National Park, September 1962. In 1982 it was enlisted as an ASEAN heritage site due to its variety of flora and fauna, and is now world – famous, Khao Yai has also been nominated as a UNESCO World Heritage Site. The Dong Phayayen- Khao Yai Forest Complex spans 230 km between Ta Phraya National Park on the Cambodian border in the east, and Khao Yai National Park in the west. The site is home to more than 800 species of fauna, including 112 mammal species (among them two species of gibbon), 392 bird species and 200 reptile and amphibian species. It is internationally important for the conservation of globally threatened and endangered mammal, bird and reptile species, among them 19 that are vulnerable, four that are endangered, and one that is critically endangered. The area contains substantial and important tropical forest ecosystems, which can provide a viable habitat for the long-term survival of these species. It is Thailand’s third largest Nation Park, covering an area of 2,165.55 sq.km. and its highest peak, Khao Rom, reaches an elevation of 1,351 m. above sea level. Khao Yai is part of the Dongrak Range, which forms a mountainous wall fencing the northeast plateau form the central plain of Thailand. Park headquarters are situated roughly 200 km northeast of Bangkok. The park extends across four provinces: Saraburi, Nakhon Nayok, Nakhon Ratchasima and Prachinburi. Khao Yai has many attractions, including waterfalls, a rich diversity of plants [approx. 2,000 species], plentiful wildlife and an interesting cultural history. It is easy to understand why Khao Yai is Thailand‘s most popular National Park. Khao Yai has three main seasons, with an annual mean temperature of 23° C, though this varies greatly with the seasons. Rainy Season: May-October. During this season, it rains most days, resulting in stunning waterfalls. The atmosphere is humid, with average daytime temperatures of 27° C, In the humidity, flora and fauna flourish, whilst after the rain there is clean air and clear visibility. Cold season: November- February. This is the most popular time to visit Khao Yai, as clear, sunny and cool weather are ideal for hiking and nice sunsets are common. The days average around 22° C, while the nights can drop to 10° C. Hot Season: March-April Even in the hot season, Khao Yai does not experience of heat felt elsewhere in the country. Daytime temperatures reach between a high 20° C, to a low 30° C, During this season it is dry and often windy. Waterfalls can be dry by April.