The name of Namtok Chet Sao Noi is from the story of the people in the area. For along time, seven ladies tourist drowned together in this waterfall. (Namtok=waterfall, Chet=seven, Sao Noi=young lady) and another story believed that it came from a village's name "Ban Sao Noi" (Pronounce shortly) and it became "Ban Sao Noi" until present.

The most area of Namtok Chet Sao Noi National Park is ruggedly mountainous alternate with the plateau. The area rather dry with the shallow soil surface, height above msl is 180-402 m. The highest peak of the area is on the Chokchai Phatthana with 402 m above msl , next is the mountain range which is in the central of the area and Ban Dong Namcha mountain range 386, 359 m above msl following. The foothills are on the East and the North side, which near Khlong Muak Lek, there is a stream flows all year and tributary to Pasak river at Wang Muang district while the central area with streamlet flow through is Huai Laeng which has the stream in only rainy season.

Chet Saonoi Waterfall

Namtok Chedsaonoi has 7 levels shortly waterfall, each levels about 2-5 m height, the stream flows witharm like a wild pool. There are the shallow pools can play, the most beautiful level is on the fourth, especially in the month of November-April, because of clear water and safety for the tourists; with not torrential stream as May-October.

Muak LeK Stream

the river with stream all year-round, along the river takes distance about 15 km.

Tree tunnel

Tree tunnel, is the beautiful astonishing scenery on highway number 2089, on the west of the area. Tree tunnel occurs from the covering of tree crown along parallel road bring the pleasant and the beautiful to the tourists. Moreover found 2 waterfalls in the west of the area, first highs about 4 m and the second is about 20 m.