The Winchester Mystery House is a sprawling Victorian mansion located in San Jose, California. Built by Sarah Winchester, the widow of firearm magnate William Wirt Winchester, construction began in 1884 and continued for 38 years. The house features an unusual architectural style, with numerous rooms, staircases that lead to nowhere, and doors that open into walls, creating a sense of mystery. The mansion is often associated with legends of hauntings and the belief that it was designed to appease the spirits of those killed by Winchester rifles. Today, the Winchester Mystery House is a popular tourist attraction, offering guided tours that explore its unique design and history.