I´m glad this is not a part of My World every day ;-) The Alcatras prison on the Alcatraz Island in San Francisco. I visited it during my trip to U.S this Christmas. In the 1800s it was built for military use. 1934 Alcatraz became the worlds most escape-proof prison because of the ice cold water with extreme strong currents surrounding the island.
Yet there is a group of prisoners who disapeared from the prison and have still not beeing located. Frank Lee Morris and the Anglin brothers John and Clarence, has never been heard from and their bodies have never been found. Escape from Alcatraz with Clint Eastwood, is a filmversion of their spectacular planning and escape in 1962.
The usual practice was that the prisoners were shot or drowned during their escape. In the years the Alcatraz prison was open 36 prisoners tried to escape. 15 of them died during their escape attempt. Alcatraz was closed in 1963 due to economical difficulties. Today Alcatraz Island and the prison is a popular excursion for tourists. Absolutely worth a visit if you "pass by".