The Khao Yai National Park was established in 1961 and this important park is host to more or less 2,500 plant species, 67 different varieties of mammal and over 300 species of birds. The plentiful fauna includes numerous endangered mammals such as elephants, gibbons, tigers, leopards and even Malaysian sun bears. The whole area is interwoven with hiking trails, ranging in length from one and a half to eight kilometres. There are in addition many waterfalls, the tallest and most spectacular of which is Haew Narok standing at over 80 metres.
The park covers approximately 2200 square kilometres, making it the second largest in Thailand. One of the best times to spot the wildlife is at night when you travel by jeep on an exciting safari deep into the park with experienced park rangers and animal spotters. For anyone hoping to spot wild elephants November through February is the best time of year. The park is located two hours north of Bangkok by road.