Khao Yai
Khao Yai or "Big Mountain" sprawls over parts of Nakhon Ratchasima, Prachinburi and Nakhon Nayok. It is the most popular national park in the country, attracting one million visitors a year with its scenic beauty and abundant plant and wildlife. Khao Yai has four vegetation zones, spanning elevation from 100 meters to more than 1,400 meters : evergreen rainforest, semi-evergreen, mixed deciduous and hill evergreen forest. It is also home to a large array of birds and animals.