Chillingham Castle famously boasts some of the highest levels of paranormal activity in the country. Countless visitor accounts tell of scary apparitions, leading Chillingham to be the subject of paranormal investigations by television shows like the Scariest Places on Earth and Ghost Hunters International.
Even the American poet Henry Wadsworth Longfellow described Chillingham as a hotspot for the supernatural:
"All houses in which men have lived and died are haunted houses:
Through the open doors the harmless phantoms on their errands glide,
with feet that make no sounds upon the floors."
Among the castle's more famous ghosts are the ghosts of Lady Mary Berkeley, a former resident whose husband cheated on her with her sister. It is said that her spirit still roams the grand hallways of Chillingham, particularly the Grey's Apartment where she allegedly died of heartbreak.
There is also the apparition known as "blue boy" who is said to have been the cause of frantic screams heard at midnight. It's alleged that guests frequently saw the little boy ghost hovering by their beds. The blue boy is suspected to be the ghost of the boy whose bones were discovered inside the thick walls of the Pink Bedroom. It's unknown how the remains ended up inside to this day.
But the most outrageous thing about this famous haunted castle is the fact that visitors who don't mind uninvited guests can book a room at the castle for an overnight stay.