16 Secret UFO Locations Other Than Area 51

Nevada's Area 51 is the world's best-known secret base. It's been featured in books, movies, and TV mostly because many people suspect the U.S. government hides UFOs inside its vast confines.

But Area 51 isn't the only such place -- there are other mysterious sites that are truly secret and almost unknown, but with connections to UFOs all the same.

TruTV tracked down the most mysterious.

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