Counting down the top 10 locations around the world that may be hiding alien bases, including a cavern beneath the ice of Antarctica, a lake in China that is a hotspot for UFOs, and a pyramid under the slopes of Mount Denali.....

Starring:

William Henry, Robert Clotworthy, Andrew Collins, Nick Pope, Erich von Däniken, Linda Moulton Howe, Philip Coppens, David Childress, Mike Bara, Jonathan Young, George Noory, 8 more, Nick Redfern, Robert Schoch, Michael Dennin, Hugh Newman, Giorgio A. Tsoukalos, David Wilcock, Bill Birnes, Ariel Bar Tzadok

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