Sai Yok is a town along the River Kwai and is also a Thai National Park. Mammal species found in the park include elephant, gibbon, macaque species, Malayan porcupine, slow loris, serow, barking deer, sambar deer, wild boar and many more. It is thought there to be a small tiger population in the park as well. The scenery here features mountains, waterfalls and lush forests willed with wildlife and is a beautiful refuge for man and animals alike. Take in the scenery of the lush Kwai River Valley on a stop in Sai Yok.