ADX Florence, US Located in the United States, ADX Florence, is known as one of the world’s worst prisons due to its extreme security measures. Commonly known as the “Alcatraz of the Rockies ...

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Look into the hidden world of one of Russia's most impenetrable and remote institutions - a maximum security prison exclusively for murderers. Gallery 15/15 ...

Look into the hidden world of one of Russia's most impenetrable and remote institutions - a maximum security prison exclusively for murderers.

More than 40 US states run "super-maximum security" prisons for particularly violent or ill-behaved convicts. But the federal government runs only one "Supermax:" the notorious US Penitentiary ...

Netflix is gearing up to launch an eight-part docuseries from Inside The World’s Toughest Prisons producer Emporium Productions about some of the world’s most elite and secretive military units.