s an open area on top of the Phu Phan Noi Range, about 600metres above sea level,in Phan Don-Pakho national Foreat Reserve,Thap Kung sub-district,Nong Saeng district,Udon Thani province.The geography of the area is a complicated high mountain that is the origin of rivers and streams,with various types of forest areas and a cool climate all year round.