is in the Sankamphaeng Range. It occupies parts of four provinces: Nakhon Ratchasima, Nakhon Nayok, Saraburi, and Prachinburi. The jungle here divides the central region and the northeast. Khao Yai became Thailand's first national park on 18 September 1962 and is an ASEAN World Heritage because of its variety of flora and fauna. The general terrain of Khao Yai National Park consists of mixed forest.