Muak Lek Arboretum There is a Muak Lek waterfall that originates from Khao Yai National Park. There is water flowing throughout the year. Covering Muak Lek District, Saraburi Province and Pak Chong District, Nakhon Ratchasima Province, there is a photography point for the Muak Lek - Pak Chong Bridge. It is a suspension bridge over the Muak Lek stream. and is a source of rare and economically valuable plants