Khaoyai National Park
Khaoyai National Park, is the oldest and largest National Park in Thailand. Established on September 18, 1962. It covers and area of 2,168 Square Kilometers of 4 provinces (Nakhon Ratchsima, Nakhon Nayok, Saraburi and Prachin Buri). The altitude ranges from 200 to 1,200 meter about sea level, rich in wildlife.