Petroglyph National Monument is located in the northwestern suburb of Albuquerque, New Mexico. The area around the national monument is filled with volcanic rocks. There are a lot of petroglyphs on those volcanic rocks in the national monument by Pueblo tribes lived in the region before the Spanish arrived. What is interesting is even some of the rock carvings were even by the early Spanish settlers. Many petroglyphs show humans, animals, but some of them are difficult to comprehend. The national monument is amazingly huge and there are three canyons Boca Negra, Rinconada, and Piedras Marcadas Canyon. There are trails around the canyons and petroglyphs.