My obsession with Danvers State Hospital (aka Danvers Insane Asylum) started with the horror movie Session 9 back in 2001, which was filmed inside the then 120-year-old abandoned asylum. Over the next two decades, I visited the site, found the asylum cemetery, watched Session 9 on the site where it was filmed, and, just a few months ago, returned to find the second asylum cemetery. This is the whole story.

• Photos from my first visit to Danvers State Hospital.