The trail passes by large panels of petroglyphs (carved pictures), that are thought to be hundreds of years old. Although their exact meaning is unknown, they are most likely not a type of written language, but rather held deep spiritual and artistic significance to ancient (and modern) indigenous people. There are many petroglyphs in this area, so be sure to take your time to try to find all of them - many of them blend in with their surroundings! Like in most archeological sites, please do not touch these ancient carvings.