Counting down the top ten alien petroglyphs around the world, from strange, human-like figures to flying craft and carvings of what appear to be astronauts. Could these mysterious carvings provide a record of extraterrestrial visitation?
Genres: Documentary , Mystery , Sci-Fi & Fantasy
Keywords: ancient-aliens-theory , megalith , paranormal-investigation , petroglyph , ufo-conspiracy , latest-episodes , watch-full-episodes-online