Did you know the Winchester Mystery House is celebrating its 100th anniversary? Millions of guests have visited the South Bay landmark, but one magician called it a "mystery house." Find out how the sprawling mansion got its official name. More 'Did You Know?' videos: http://www.nbcbayarea.com/didyouknow Stay Connected: Follow us on Twitter: http://www.twitter.com/nbcbayarea Like us on Facebook: http://www.facebook.com/nbcbayarea Follow us on Instagram: http://www.instagram.com/nbcbayarea Follow us on TikTok: https://www.tiktok.com/@nbcbayarea Catch up on all the day's news: http://www.nbcbayarea.com/ Download our mobile app: On iOS: http://nbcbay.com/R1BhqYM On Android: http://nbcbay.com/rUcA97h Watch us on OTT: Add our channel on Roku: https://bit.ly/3ySK60j Download our app on Amazon Fire TV: https://amzn.to/3FmmiEA