New Stone Age
The earliest prehistoric rock drawings studied extensively were those found at the boundary of Angono and Binangonan, Rizal Province. The site is a rock shelter or a shallow cave about 63 meters wide, 8 meters deep and 5 meters at its highest point. One hundred twenty seven human figures scattered on the wall were made by engraving lines using a piece of stone on the surface of the rock shelter. The cuts vary from ten centimeters down to faint lines figures. The figures consist of circular heads, with or without necks set on a rectangular or v-shaped body. The linear arms and legs are usually flexed. Some incisions on the rock wall are triangles, rectangles and circles. Rock art is closely linked with a system of belief of a particular group of people. It is symbolic, not decorative.
Rock art in the Philippines is rare. Samples of these drawings were reported in places such as Penablanca Caves in Cagayan Valley; rock outcroppings in Alab, Bontoc, Mt. Province; and caves in Singnapan Basin in Ransang, Palawan.