Khao Yai is forest world heritage. It has natural sources,animals also interesting hiking and activity natural. Khao Yai National Park is the first national park in Thailand. Has area 2165 square kilometers. It live in Khao Pha Nom Rak mountain. It contains many of the small mountain complex. It plentiful with plants and wild animals. Khao Yai get registered world heritage on behalf of Khao Yai national Park in 2005.