Top 10 Petroglyph Sites in the Western United States

Petroglyph Canyon Trail - Castle Gardens Petroglyphs - Nine Mile Canyon - Petroglyph National Monument - Winnemucca Lake Petroglyphs - Chaco Canyon - The Three Rivers Petroglyph Site - The Newspaper Rock - Sego Canyon - Horseshoe Canyon If you are interested in the Ancient Astronaut Theory, like I am, you must be into petroglyphs!...