ALCATRAZ.
The Rock.
It was once a Fortress, then it was a Prison. THE Prison.
If you got sent there, it wasn't to be "rehabilitated", it was to be punished! Some of the inmates there included Arthur "Doc" Barker, George "Machine Gun" Kelly, The Purple Gang, Robert Stroud (The Birdman of Alcatraz) Sam Shockley, Floyd Hamilton (The Barrow Gang), members of the Barker/Karpis Gang and of course, Al Capone.
The penitentiary was closed on March 21, 1963 upon the orders of Attorney General Robert F. Kennedy.
After the close of the infamous prison, movies were filmed about the prison or about some of it's more infamous inmates.
Some of the films about Alcatraz or filmed at Alcatraz include: "The Rock", "The Birdman of Alcatraz", "Escape From Alcatraz", "Murder In The First", and "The Enforcer".

But movies aren't the only strange things about Alcatraz. The former federal prison is haunted. Visitors have reported paranormal encounters there. Voices have been heard in empty prison cells, the Hospital Ward and in the Dining Area. Footsteps have been heard walking down corridors, but when someone went to investigate, no one was there. There have also been unexplaned cold spots. Cellblock doors have been heard slamming shut for no reason or explanation. Finally, there are the screams.

D Block is especially haunted. It is underground and the prisoners taken down there were usually taken there to be put in Solitary Confinement. The Cell in D Block was called "The Hole". The only thing that awaited you there was a hole in the floor to go to the bathroom, a small steel shuttered opening to get food and water, a straw mattress, and once the cell door was closed....complete Darkness.
One incident which took place during the 1940's was when a particularly hard nosed prisoner was locked in the Hole for some infraction which has now been long forgotten.
Within five minutes of being locked inside the darkness of the Hole, the inmate began screaming. He claimed that there was some creature in the cell with him and that it had glowing red eyes.

The Guards didn't take him seriously even after claiming that the thing was attacking him. His screams sounded thru the cell block for the next couple of hours.
Finally, there was silence.
When the Guards went to check on the inmate the next morning, they found him quite dead. The Inmate had a look of abject terror frozen on his face and on his neck were the clear prints of hands. An Autopsy concluded that the inmate had died of strangulation....and fright. The Guards were examined and it was concluded that none of the guards had attacked the screaming prisoner. The day after the mysterious event, several guards who were performing a head count noticed that there were too many men in the lineup.
Then, at the end of the line, they saw the face of the convict who had recently been strangled in the "Hole"! As they all looked on in stunned silence, he slowly vanished.