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.

The following written confession was submitted via email: I live in Madera county California it borders Yosemite I am a hunter and twelve years ago I took a week off of work and couldn't find anyone to go up with me so I went by my self I hunted up sky ranch road and the first couple of nights something didn't feel right I don't scare easily but every night it felt worse and worse like something was getting closer and closer….