The Coltzin petroglyph, located approximately 65 km north of Mazatlán, Mexico, is approximately 8 m in diameter, carved into a cliff. It looks somewhat like a solstice wheel, but its meaning not known. ... Found on http://en.wikipedia.org/wiki/Coltzin
1) Petroglyph in Mexico 
The Coltzin petroglyph, located approximately 65 km north of Mazatlán, Mexico, is approximately 8 m in diameter, carved into a cliff. It looks somewhat like a solstice wheel, but its meaning not known. ...