50 Berkeley Square is a 4-story, brick townhouse in Mayfair. In the late 19th century it became known as one of the most haunted houses in London.
A murderous unnamed thing was said to be responsible for several deaths in the home, but there were other suspects mentioned throughout the years.There are stories of a ghost that haunts the 4th floor attic (others say the 2nd) of 50 Berkeley Square. The structure has been referred to as "the most haunted house in London". Others argue it is not a ghost at all but an amphibious, predatory cryptid, reminiscent of Lovecraft's Cthulu's pantheon.
