Watch Modern Marvels online: Episode 8 Prisons

The philosophy, architecture of today's U.S. prisons emerge from those of history. They are buildings designed to keep their inhabitants inside and under control. But very often, there is another, psychological aspect at work--they are made to look as grim and foreboding as possible. MODERN MARVELS takes a long, hard look at how prisons have been designed and built through the ages. The program starts in antiquity, where sewers and dank dungeons were commandeered to keep the unruly and unwelcome captive. Prison designers and experts examine how these ancient roots show up in the design of much more modern prisons, where many elements go beyond the need for security. We'll tour famous prisons from Alcatraz to the newest, maximum-security facilities built during America's most recent wave of prison construction. And examine the features that may well become staples of the next generation of these facilities. This is your day pass into the world of punishment, a fascinating tour of the buildings at the backbone of the penal system.

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