Authentic petroglyphs at Boca Negra Canyon Cliff Base Trail are valuable and irreplaceable cultural resources that provide insight into the prehistoric civilizations that once thrived here. Protecting these cultural treasures is a responsibility shared by everyone. Over the years, desecration has become evident through firearms damage, theft, and painted and carved graffiti. These images are forever damaged because there are no long-term reliable ways to cover up or remove modern vandalism from the petroglyphs.