An abandoned prison that once housed thousands of inmates in Philadelphia continues to produce reports of mysterious visions inside its walls.

From 1829 to 1971, Philadelphia's Eastern State Penitentiary was a state-of-the-art prison housing about 75,000 inmates, including Chicago mobster Al Capone.

However, some say the spirits of several inmates still linger inside the cells.

The report featured Sean Kelley, who has worked at the prison since it opened for public tours in 1994.

"You walk into a cell and the furniture is sitting on its side," Kelley said. "There's sort of this disarray of papers on the floor and you just can't help but feel there was someone just in that room before you walked in.

"I would say there are some actual souls trapped here, spirits trapped here," paranormal investigator L'Aura Hladik said.

Gary Johnson, who volunteers as a locksmith at the penitentiary, said the first time he saw a ghost, the back of his head felt frozen.

"He said, 'Yes, we exist, we always have and we're always going to be here at the prison,' and then he winked at me and he faded back into the wall," Johnson said.

Program Director Sean Kelley, who is a self-professed skeptic, admitted that if there is any place that would be haunted, it is the prison.

"There's that quote from Edgar Allen Poe where he says, 'I don't believe in ghosts, but I've been running from them all my life.'" Kelley said.

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