Are these structures ACTUALLY from out of this world? See more in this compilation from Ancient Aliens. 00:00 - Carnac Stones Baffle Archaeologists 03:45 - Sky God Landing Pad in Baalbek 06:46 - Extraterrestrial Ties to Japan’s Holiest Monument 12:31 - Giant Stone Structure Hides a Secret ...

Tune in to Alien Invasion Week on History starting Monday 9/30 through Friday 10/4 for new Ancient Aliens, plus the premiere of In Search Of, new UFO Specials and More! The Carnac Stone are the largest collection of standing stones in the world, but nobody really knows why they were built in ...