Library of Congress
Loc: America's Story: First Prisoners Arrived at Alcatraz
Why is Alcatraz Penitentiary called "The Rock?" Who is sent there? This Library of Congress site has more information and photographs.
Other
Canada's Penitentiary Museum
This unique museum aims to preserve the history of Canada's penitentiary system, believing you can learn a lot about a society by understanding its correctional system. You can read some of this history here.