#BoulderSunday by @shasta
Petroglyph National Monument is one of the largest petroglyph sites in North America. Near Albuquerque, the park has over 25,000 petroglyph images within it's 17 mile boundary.
An estimated 90% of the petroglyphs were created by the ancestors of today’s Pueblo Indians and many were believed to have been carved between 1300 and 1700 AD.
Although most of the petroglyphs were beautiful, there were instances when we doubted the authenticity of some of the rock art. The park is easily accessible to the public and it would be easy enough for pranksters and vandals to have made their way here, especially before the park was established in 1990.
Evidence of ancient aliens or more modern graffiti? What do you think?
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