The Alcatraz Federal Penitentiary or United States Penitentiary, Alcatraz Island (often just referred to as Alcatraz) was a maximum high-security federal prison on Alcatraz Island, 1.25 miles (2.01 km) off the coast of San Francisco, California, which operated from August 11, 1934, until March 21, 1963.
If you get chance to go one one of the tours I would highly recommend it and if you can do the small group night tour it’s even better. You get the chance to wonder around areas the main tour won’t take you and there are far less people so access to the cells is a better experience.
All images taken with a Sony a58, thanks.