A permanent exhibit on Alcatraz Island tells the story of the United States prison system through the voices and experiences of those formerly incarcerated, scholars, and criminal justice advocates. The Big Lockup: Mass Incarceration in the United States is a free self-guided experience that uses text, photographs, multimedia and interactive content to engage audiences on the history of incarceration in the country, both before and after the period during which Alcatraz Island was a military prison and federal maximum security penitentiary. 

For more information, visit the National Park Service webpage for The Big Lockup: Mass Incarceration in the United States.