The creepy snap seems to show a ghoulish face in shadows on the first-floor window of the former psychiatric hospital - despite it being closed for 15 years.
The asylum in Bronllys, Brecon, Wales, was also a Prisoner of War camp in World War Two where captured German soldiers were kept.
After the war it housed psychiatric patients who were sometimes lobotomised for conditions like postnatal depression, alcoholism and senile dementia.
At least one patient is known to have died on the site from a pre-frontal lobotomy which saw part of the brain damaged by cracking open the skull and severing nerves.
The spooky image was taken by walker Adam Smith as he strolled past the outside of the crumbling, moss-covered building.
He said: "I caught an epic shot of a ghost at the abandoned Brecon and Radnor Lunatic Asylum.
"Maybe it was a patient who had a lobotomy or perhaps a soldier patient from the war or maybe a Nazi prisoner.
"Whatever it was, it certainly gave me a fright."
Read Full Stroy: Mirror UK
Ghost of former patient appears in a abandoned asylum window
Tags :
Brecon and Radnor Lunatic Asylum,
Bronylls,
Ghost,
Haunted,
Paranormal,
Wales
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