Prehistoric Petroglyphs at Pha Phak Wan, located in Ban Phu Ta Kham, Song Dao District, Sakon Nakhon Province, 18 kilometers away from Phu Pha Lek National Park Office. An ancient painting, about 3,600 years old, on a large rock has a picture that resembles women standing in a row with their hands clasped on their shoulders. The painting is on one wall of a large sandstone, about 12 meters high from the ground to the top, 17 x 12 x 11 x 8 meters wide and long. The painting is on the east wall, about 5 meters high from the floor. Written in red as a picture of people divided into 2 groups above, written as a portrait of a person in solid color. It is a picture of a person with bobbed hair, spreading legs and squatting slightly, arms raised in a curved circle, hands outstretched. It is assumed to be directing the dance of a group of people. and below, drawn as a figure of a person with an outline drawing of 8 people standing in a row, 5 people facing the same direction in the same direction, similar to a dance line, crouching, buttocks and raising their arms forward at the same time. The image of both groups uses space to divide the image, showing the close-up of the position of the people in the dance group picture below, while the conductor is far away, so that the picture is clearly not overlapped.