12. Visit Khao Yai National Park
Khao Yai National Park was the first national park to be established in Thailand and is the third largest in the country. Covering an area of 2,168 square kilometers it is a huge site to visit. The park comprises of rain forests as well as grasslands which all adds up to the large number of animals you can see. There are an estimated 300 species of birds in the park as well as bears, elephants, deer’s, gibbons and macaques. There are a couple of waterfalls in the park which are well worth a visit as well and are easily accessible by car.