Ancient Aliens Season 19 Episode 20
The Top Ten Alien Petroglyphs
Returning Series
41 min
7.1/10 Votes: 12729
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?
