One of the more recent criminals to arrive on Alcatraz's shores, James 'Whitey' Bulger only died in 2018. He was a notorious organised crime boss who led the Boston-area Winter Hill Gang, and had reportedly also been a high-level FBI informant starting in the mid-1970s. He spent a brief period in Alcatraz starting in 1959, but was later out of prison for 46 years. When he was eventually arrested again in 2011, the charges included 19 murders.

These are the most dangerous tourist attractions in the US

The mysterious story of Alcatraz, America's most notorious prison