A Supermax Prison is a high-security facility designed to hold the most dangerous and violent criminals. These prisons use advanced security measures, including surveillance cameras, reinforced walls, and strict inmate control, to prevent escapes and maintain order. Inmates often spend 23 hours a day in their cells, with limited access to recreational activities. The term "Supermax" is short for "super-maximum security," and these prisons are often home to notorious criminals, including those involved in organized crime or terrorism. Examples of Supermax facilities include the United States Penitentiary Florence ADMAX in Colorado and Alcatraz Island in California, which was once a famous high-security prison.