Khao Yai

Khao Yai National Park was Thailand's first National Park, established on September 18, 1962 and is located 400 m and higher above sea level, making it cooler and more pleasant than the hot, humid lowlands in Central Thailand.
You will get up before sunrise and embark on a hike to spot Khao Yai's gibbons. The early morning is the best time of day for spotting wildlife.
Back to the Park's headquarters for breakfast.
After breakfast (on own costs) start on the long hike from the park's headquarters to Haew Suwat waterfall.
Lunch at Haew Suwat.
In the afternoon walk from Haew Suwat to Pha Kluay Mai waterfall or relax at the waterfall.