Finally! After years of wondering if ghosts are real, today you receive your answer. Yes they are, and one of them "lives" (if you can call it that, because, ghost) at San Francisco's infamous penitentiary, Alcatraz.

By way of the completely reliable Daily Mail comes a report from 48-year-old Birmingham (not the one in Alabama) teaching assistant Sheila Sillery-Walsh, who visited the world-renowned prison back in April. Let's take a look at her experience.

Alcatraz Penitentiary is a must-see for any tourist. However as soon as we entered the prison, everything felt very eerie. I didn't feel comfortable there.

Which is so weird, because you're really expect a former prison to be cosy and inviting.

Whilst doing an audio-tour of the place, I casually stopped to take a snap of the empty visitation block window on my iPhone.

OK, sure.

When I glanced at the photo on my mobile [you can see it above], I saw this dark female figure in the picture. I looked at the window again and there was no-one in the room.

What is with the Daily Mail and haunted Apple devices? They also "reported" on this image, found on all iPads, that is likely haunted by the ghosts of dead babies, and then there's this garden ghost caught on iPad. No one seems to be catching any ghosts on Samsung Galaxies or Nokia Luminas, if the Mail is to be believed.

I knew straight away that the woman in the photo was a ghost and showed the snap to Paul.

That's 50-year-old Paul Rice, Shelia's boyfriend.

From that point onwards, I wasn't interested in the Alcatraz tour anymore. I just kept looking at the picture over and over again!

Paul also has thoughts:

When I first saw the photo, I tried to rationalize the female figure away by saying it was just Sheila's reflection.

I'm sure Shelia reacted really well to that response.

But with closer inspection, it's obvious that this is not the case at all. The woman's hair and clothing is from a different era - it looks like she's from the 1930s or 40s.

Nice save, Paul. Keep it coming.

I have no logical explanation for the girl in the picture - I'm baffled by her! It's funny because she's staring right at the camera, with a knowing look. I was really skeptical about ghosts before but I'm a bit more of a believer now. I do think that the woman in the photo is a ghost.

And gentlemen, this is how you pull yourself out of a horrible cycle of recriminations and "you never believe me"s when you're stuck in a foreign country with some crazy chick who swears her iPhone took a picture of a ghost. You just roll with it. Good man, Paul.

To be fair, Shelia's certainly not the only person to claim to have seen a ghost at Alcatraz: those goofballs at SyFy show Ghost Hunters used a visit to Alcatraz to kick off their sixth season, concluding with a declaration that "Alcatraz is haunted with both residual and intelligent haunts."

Spokespeople for the Golden Gate National Recreation Area, which now oversees the long-closed prison, dismiss claims of hauntings and other paranormal events at the penitentiary, because those things are not real. Even Alcatraz Cruises, which runs the boats you take to and from the island, has had to list "Is Alcatraz haunted?" as one of their FAQs.

However, even the boat company concurs with the GGNRA, saying that "there are no authenticated cases of ghost sightings by any of Alcatraz’s residents over the years, whether they were soldiers, prisoners, correctional officers, family members or park rangers."