Alcatraz was considered escape-proof, but in 1962 the Anglin brothers and Frank Morris disappeared on a raft.
BBC: A tour of San Francisco??s Alcatraz
2.
Inmate Frank Morris and fellow convicts, brothers John and Clarence Anglin, had pulled off one of the greatest prsion escapes in U.S. history.
FORBES: Escape From Alcatraz Redux
3.
The 12-acre federal penitentiary, which ceased operating in 1963, is now a tourist attraction made even more famous by the mystery surrounding the escapes of Morris and the Anglin brothers.