The house at 112 Ocean Avenue in Amityville, New York, stands as the most famous haunted residence in American paranormal history, its reputation founded on documented violence and extraordinary paranormal claims that continue to captivate popular imagination. The Dutch Colonial-style property, constructed in 1927, was an unremarkable suburban dwelling until tragic events transformed it into an international symbol of supernatural horror. On November 13, 1974, Ronald DeFeo Jr., a young man living with his family, systematically murdered six family members while they slept in a brutal, methodical killing spree that shocked the nation. Executing his parents and four siblings in a nighttime massacre, DeFeo Jr. created one of America's most infamous domestic mass murders, permanently marking the house as a place of violence, death, and intense tragedy. Ronald DeFeo Jr. was subsequently arrested, tried, and convicted for the crimes, though his motive remained unclear despite extensive psychological evaluation and investigation by authorities. Following a significant period of vacancy, the Lutz family moved into the residence in 1975 at a reduced purchase price reflecting the difficulty of selling a property so recently the scene of such violence and tragedy. Their occupation set in motion one of the most famous haunted house narratives in American history. According to their detailed account, paranormal phenomena began within hours of their arrival and escalated rapidly into increasingly terrifying manifestations. The family reported experiencing disembodied voices echoing throughout the house without identifiable source, cold spots appearing suddenly and inexplicably, moving objects relocating without physical cause, and electrical interference affecting household systems and appliances. Most notoriously, they encountered a demonic pig-like creature with burning red eyes appearing menacingly at windows, and experienced phenomena suggesting levitation of children suspended in air without physical support. Family patriarch George Lutz experienced a compulsive behavior of waking at exactly 3:15 a.m. each night. Green slime allegedly oozed from walls without chemical source, and malodorous smells permeated various areas of the house without biological explanation. The Lutz family occupied the house for only 28 days before abandoning the residence entirely, claiming that the paranormal phenomena had become unbearable and represented a genuine threat to their safety and psychological well-being. Their harrowing experience formed the basis for "The Amityville Horror," a bestselling book adapted into motion pictures and inspiring numerous cultural references and sequels. The publication cemented the property's reputation as a location of demonic haunting and paranormal activity. The property's address was officially changed from 112 Ocean Avenue to 108 Ocean Avenue in an attempt to discourage paranormal seekers and curious visitors, yet the house remains famous by its original number throughout popular culture and paranormal research circles. Paradoxically, numerous families subsequently lived in the residence without reporting the intense paranormal phenomena described by the Lutz family. This dramatic contrast raises fundamental questions about whether the phenomena were genuine paranormal activity, elaborate fabrication designed to explain family dysfunction, or psychological projection and collective imagination fueled by tragedy. The house represents a cultural flashpoint where documented historical violence, extraordinary paranormal claims, and skeptical analysis intersect, creating an enduring symbol of American haunted house mythology that persists in contemporary paranormal consciousness.