An alien Stonehenge with a sinister purpose, an eerie building filled with strange labyrinths, and an endless concrete track in the middle of nowhere are deserted engineering projects, and new discoveries reveal why they were abandoned.
Cast Appearances
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Retitled, this episode re-aired as "Alien Hell Labyrinth" on 2/15/2019 at 2200 with a summary of "New discoveries reveal why the world's most ambitious engineering projects were abandoned, unraveling the dark mysteries and bloody secrets of these strange ruins."