Alcatraz Federal Penitentiary (Alcatraz Island)

Alcatraz Federal Penitentiary operated on Alcatraz Island in San Francisco Bay as a high-security federal prison from 1934 to 1963. It housed inmates convicted of federal offenses and was physically isolated from the mainland, making most areas inaccessible to the public during its operation. A 1962 escape by inmates is historically documented but the ultimate fate of the escapees remains debated. The island and former prison are now managed by the National Park Service and access to interior areas is controlled through authorized tours.