Siberia's Incredible 1,300 Year Old Mystery Fortress
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Five More Lesser Talked About Ancient Marvels
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The Roman Gadget Archaeologists Can't Figure Out
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Unexplained America: Strange Mysteries and General Weirdness from the USA
15:07
4 Out-Of-Place Artefacts that Shouldn't Have Existed
10:46
7 Lesser Talked about Ancient Marvels
16:37
These are the World's OLDEST (Known) Manmade Objects
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Mysterious Artifacts That Defy Explanation
19:16