READ: Research Team Experiences Paranormal Activity on Alcatraz Island

Alcatraz Federal Penitentiary was once housed some notorious criminals, but even after the prison’s closure, it seems some of them were never released. Now notorious for being one of the most haunted prisons in America, the ghosts of Alcatraz are still alive and well— metaphorically speaking, of course. Recently, a team of researchers experienced the prison’s paranormal activity firsthand when they stayed overnight while working on a project to create a 3D map of Alcatraz Island.