Alcatraz was designed to be an inescapable prison for America’s most dangerous criminals. But in 1946, a desperate breakout attempt by its prisoners forced battle-hardened U.S. Marines – fresh from the islands of the Pacific – to lay siege to the fortress on their own shores.

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For as long as humans have existed, they’ve engaged in warfare with one another. But those battlefields often put soldiers at odds with nature’s deadliest combatants. These are stories of the conflict between humankind and one of the animal kingdom’s most effective units.

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The Vietnam War was defined by brutal heat, punishing rain, and impenetrable jungles full of hidden danger at every step. And that was just on the surface. Underneath it all there was an even more fearsome battleground, in the dark, claustrophobic and deadly labyrinth of Vietcong tunnels.

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When Chupacabra attacks swept across Chile in 2000, the military stepped in. But what they discovered was so shocking, it drew the attention of NASA.

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Veterans share chilling encounters with haunted aircrafts, ghostly pilots, and red-eyed figures lurking in cargo bays.

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Strange things seen by members of the military and others.

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The tragic tale and eerie encounters of La Llorona, the legendary wailing woman.

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Were the strange visions simply a trick of the night vision goggles, or did they truly reveal paranormal entities?

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