Alcatraz is a small island located in San Francisco Bay, California. It is best known for the Alcatraz Federal Penitentiary, which operated from 1934 to 1963. The prison housed some of the most notorious criminals in American history, including Al Capone and Robert Stroud, also known as the "Birdman of Alcatraz." Today, Alcatraz Island is a popular tourist destination and part of the Golden Gate National Recreation Area. Visitors can explore the historic buildings, learn about the prison's history, and enjoy stunning views of the San Francisco skyline and the Golden Gate Bridge.