Original:The park, which covers an area of 2,168 square kilometers in the Phanom Dong Rak mountain range, stretches over 4 provinces including Nakhon Ratchasima, NakhonNayok, Saraburi, and Prachin Buri.
Khao Yai became Thailands first national park on 18th September 1962 and is also originally recognized as the National Park Heritage of Asian Group Countries.