Although traces of Native American culture can be found throughout the monument, it is of course best known for the over 20,000 petroglyphs (images pecked or carved into rock) that can be viewed there.  Five volcanic cinder cones on the West Mesa of Albuquerque produced the basalt boulders that were the rough canvas for these amazing petroglyphs.  The Visitors Center, once a homestead-era traditional adobe home, is the best place to start your visit.