Drain Alcatraz: The World's Most Notorious Prison | Drain the Oceans SPECIAL

Alcatraz, the world's most notorious prison, reveals its deepest secrets after the deadly waters that surround it are drained away. National Geographic is the world's premium destination for science, exploration, and adventure. Through their world-class scientists, photographers, journalists, and filmmakers, Nat Geo gets you closer to the stories that matter and past the edge of what's possible.

Courtesy of National Geographic on YouTube. Watch on YouTube ↗

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