The photographs housed at the University of Sheffield’s National Fairground and Circus Archive aren’t really meant to be spooky, but there’s just something about a vintage snapshot of a vacant carnival ride or empty sideshow stage that feels like a peek onto a horror movie set. That makes sense to collections manager Arantza Barrutia. She points out that, for many, fear is integral to the experience of a fair of any sort. The draw is “the thrill experience, the feeling of fear you get when you go on a ride…