Welcome to the first episode in our October series we're calling BOO Curious! We're kicking off this month of stories about creepy places in the Bay Area with a trip to a tourist attraction that's steeped in ghostly legend: the Winchester Mystery House. This unusual, sprawling Victorian mansion was built by Sarah Winchester, who is said to have kept building onto the house for decades in order to keep the spirits at bay. Is there any truth to this story of paranormal paranoia? Reporter Carly Severn went to find out.

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This story was reported by Carly Severn. Bay Curious is made by Olivia Allen-Price, Amanda Font, Christopher Beale and Brendan Willard. Additional support from Cesar Saldana, Jen Chien, Katie Sprenger, Jasmine Garnett, Carly Severn, Attila Pelit and Holly Kernan.