Petrified Forest National Park, Arizona.
Summer Solstice June 2018
Mind blown.
I saw four Solstice rock art sites this year. The best petroglyph calendar I witnessed in action was at Puerco Pueblo in Petrified Forest National Park, Arizona. It is truly remarkable how precisely it animates. A ray of light becomes a snake meandering over a boulder. Just before it reaches the target, the snake extends its tongue and licks the target before its head advances over the petroglyph. The precision of this animation is unbelievable!
THE ANCIENT SOUTHWEST 