Khao Yai National Park, which means “Big Mountain”, is the third largest natural park in Thailand. Its highest peak rises1,351 meters above sea level.
Established in 1962, Khao Yai National Park is the first national park in the country.The 216,800-hectare Park covers portions of the provinces of Nakhon Ratchasima, Saraburi, Nakhon Nayok, and Prachinburi.