Dubbed Britain’s most haunted castle, Chillingham dates back to the 13th century and houses an unsettling cast of spirits. Famous residents include the Radiant or “Blue Boy”, whose blue ghostly glow and cries once emanated from a wall where a child’s skeleton and blue cloth were discovered, and Lady Mary Berkeley, whose rustling dress is heard as she searches the corridors in sorrow. Investigators also report chilly presences, whispering voices near the chapel, apparitions in the pantry, and whole phantoms in full stride haunting its ancient halls.