Inside a 'haunted' 149-year-old million-dollar castle hidden in San Francisco with underground caves that hosts events like Google dinner parties

· Albion Castle is a four-story castle in San Francisco that was built in 1870 as a home and brewery.
· The tech hub has grown up and around it over the decades, and now the castle is all but hidden.
· It has passed from owner to owner and has been used in a number of ways, but its current owner bought the castle in...