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Expand your horizons with powerful and insightful news and information documentaries from the worlds of science, nature, medicine and outdoor adventure.

A military base trains soldiers in modern warfare to help defeat the Nazis; a suburban basement becomes a major cog in the Detroit bootlegging scene; a brave woman leads a labor union against organized crime.

Mysteries of the Abandoned: Hidden America

America's Hidden Training Camp

A brewery in the Pacific Northwest sustains prospectors during the Gold Rush; a Wyoming mining settlement descends into lawlessness; a murder in a small Mississippi town sparks a revolution.

Secrets of the Olympia Brewery

A desert facility trains a nuclear strike force; a church becomes a sanctuary from racial violence; an old military building spawns a creature that haunts a small town.

The Lair of the Mothman

The remains of Idaho's nuclear industry mark a new era of American history; a distillery in rural Kentucky revolutionizes liquor; a New England settlement prospers despite prejudice; subterranean chambers produce many of the nation's monuments.

Idaho's Atomic Ghost Town

A research facility spawns new technology with earth-shattering implications; a coastal haven for African Americans changes the nation; a forgotten fortress fights off a Nazi submarine; a staunch building stands firm on San Francisco's darkest day.

The Vermont Doomsday Gun

A strange structure in New York becomes a testing ground for Nazi technology; a thriving amusement park is laid to ruins by an unstoppable force of nature; an island becomes a major player in a controversial industry.

Nazi Secrets in the Empire State

A company town produces weapons that transform the Wild West; a building complex revolutionizes communications on this world; an old mine bears the scars of a deadly labor conflict; a forest hides the remains of a socialite's mansion.

America's Gun Factory

A crew searches for a shipwreck loaded with gold and sets off a long legal dispute; a lavish complex in the Catskills attracts many of America's comics; a zoo full of metal sculptures marks the spot where war once came to Colorado.

Hunting for the Ship of Gold

A worldwide communications facility is taken over by a dangerous cult; a secret arsenal harbors the most destructive weapons ever known; an ordinary inn has a surprising history.

The Cult Hotel

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Scattered across the United States are abandoned structures, forgotten ruins of the past and monuments to a bygone era that reveal the secrets of a hidden America.

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Explore your world with powerful and insightful news and information documentaries from the worlds of science, nature, medicine and outdoor adventure.

S4 E9 | America's Hidden Training Camp