`This friend confirmed her suspicions by telling her that yes, she was being haunted–by the spirits of all those killed by the Winchester rifle over the years. The medium suggested that she move far away and build a house. The key, the medium added, would be to have the house in a perpetual state of construction. If Sarah were ever to complete the house, it would leave her vulnerable to the curses of the vengeful spirits.
Frightened and still grieving, Sarah Winchester believed every word. In 1884 she moved to what was then a rural area near San José, California. There, she purchased an eight-room farmhouse on more than 160 acres of land. Very shortly, a work crew began a perpetual construction project which would ultimately last for nearly forty years.’
There’s lots of images of the place at the Mystery House blog.