Mysterious Alien Structures Shock the World (Season 21) | Ancient Aliens | History
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Off the coast of Chile there’s an island filled with mysterious monolithic structures that hold secret powers. See more in this clip from Season 21, Episode 2, "The Top Ten Mysterious Monoliths." Watch all new episodes Fridays 9/8c; Stream Next Day, and stay up to date on all of your favorite shows on The HISTORY Channel website at http ...
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