:Category:Alcatraz Island
{{Commons cat|Alcatraz Island}}
{{Cat main|Alcatraz Island}}
Category:Islands of San Francisco Bay
Category:Islands of Northern California
Category:Islands of San Francisco
Category:Defunct prisons in California
Category:Golden Gate National Recreation Area
Category:Prison museums in California
Category:Museums in San Francisco
Category:Parks in San Francisco
Category:History museums in California
Category:Open-air museums in California
Category:Buildings and structures in San Francisco
Category:Prisons on the National Register of Historic Places
Category:National Register of Historic Places in San Francisco
Category:Law enforcement in the San Francisco Bay Area
Category:Wikipedia categories named after islands
Category:Wikipedia categories named after museums
Category:Wikipedia categories named after prisons
Category:Wikipedia categories named after buildings and structures in the United States