A huge rock, with a very weathered surface. Towards the top of this rock, there is a concentration of incised rock art. Less than 20% of the rock art in Valcamonica is incised or engraved (graffiti-type rock art), the majority being produced by percussion, or pecking. Graffiti-type rock art is of two types, determined by its method of production. One type is produced by abrading the lines, know as the polissoir method; the other, represented here is by engraving, to produce filiform rock art. Filiform because the resulting lines resemble thin wire, rather than the thicker grooves made by the polissoir method. On this part of Rock 1, towards the right in the 3D model, there is a group of incised axe heads. To the left there is a further grouping of geometrical shapes, predominately rectangles, also triangles and house-like shapes - common themes in Western European filiform rock art. Many of these figures have internal decoration.