One of the most notorious inmates is known as the "Birdman of Alcatraz," popularized by a 1962 film starring Burt Lancaster of the same name. The inmate's real name was Robert Stroud, who had spent 54 years imprisoned in various institutions — mainly in solitary confinement.

Located on a lonely island in the middle of San Francisco Bay, Alcatraz was as much a psychological prison as it was a physical one.

At the beloved attraction in San Francisco Bay, visitors could scarcely believe President Trump had suggested turning Alcatraz back into a penitentiary.