In 1936, a photographer taking pictures of the 300-year-old Raynham Hall in Norfolk, U.K., captured an image of an apparition floating down the stairs. It’s one of the most famous ghost photos ever taken, although some experts believe it was caused by double exposure.
The manor, covering an area of 7,000 acres (2,833 hectares), has a long history of being haunted, and the BBC notes that the ghost may be of Lady Dorothy Townshend, the wife of the second viscount of the estate. She died in 1726, supposedly of smallpox, after having an affair, which her husband Lord Townsend had learned about before her death. She is said to still wander the manor dressed in brown.