Above: Alcatraz, former federal prison at San Francisco viewed from
Generally known as Alcatraz, this island
is 1.5 miles (2.4 Km) offshore from
Once a maximum-security federal prison
housing notorious criminals the likes of gangsters Al Capone and "Machine Gun Kelly",
it's now a historic and recreational site.
5,000 people visit it daily, probably a few more than
when it was a prison.