Petroglyphs refer to the paintings in which objects and symbols are carved, pecked, and colored on rocks, huge cliffs and cave walls. Some of these rocky paintings are from as early as the late Paleolithic Era, but mostly they are seen from the New Stone Age, Neolithic Era and Bronze Age in which times these paintings were abundant. The upper part of the rock shows various animals including deer pecked into the rock, and the lower part of the rock has writing and drawings of humans, and animals made by penciling. As for the upper part, it is thought to have been made throughout the New Stone Age and Bronze Age to express their consciousness for abundance. In comparision, the painting of a cavalcade, a sailing boat, a dragon, a horse, and a deer and about 300 writings on the lower part of the rock were considered to be done by people during unified Silla, showing their belief of the area as a holy ground.