Savannah of the Thai Forest Thung Salaeng Luang National Park covers the area of Wang Thong District, Nakhon Thai District, Noen Maprang District, Phitsanulok and Khao Kho District, Wang Pong District, Phetchabun Province. There are natural conditions, scenery and beautiful natural features such as caves, waterfalls, large open fields, abundant with various plants and wildlife. It has an area of approximately 789,000.00 rai or 1,262.40 square kilometers. For the name of the national park is the name of large grassland on the south side of the national park. It is assumed that it was established by the name of a type of plant in this meadow, namely, Salaeng Jai, a large perennial plant, ripe, red, and its seeds yield strychnine which is a drunken substance. It is expected that in the past there were many large slang trees. In addition, the terrain is hilly, high and low, with many types of forests, and abundant wildlife therefore named "Thung Salaeng Luang" as an area that combines the diversity of nature During March – June: The highest temperature is about 29 degrees Celsius; Rainy season between May - October with rainfall in the range of 1,300-1,700 millimeters per year with the highest volume in September and in winter between November and February. In general, the weather is very cold, suitable for traveling.