I live South of Boston, just watched the E3 presentation (hyped...), and the first thing I thought of when glimpsing some swampland was, "I hope there's a quest about the Bridgewater Triangle...". It's one of those local legends that's under the surface and pretty silly, but it's something I remember fondly discussing with my friends growing up.
It's great knowing I'll be able to explore post-apocalyptic Boston and see it get the Fallout treatment; it's a dream come true, to be honest. There's a ton of history here and I'm sure the major landmarks and events will be explored in depth. I just thought the Bridgewater Triangle is a neat little bit of subculture that's perfect for the tongue-in-cheek Fallout humor (maybe even a Mothership Zeta tie-in?).
Just thought I'd bring it up in case a dev or someone stumbles upon this and can see the potential for a side-quest, DLC, or even some throwaway flavor text. There was a documentary that was successfully Kickstarted a couple years ago ( called The Bridgewater Triangle Documentary), and there's a hilarious video on YouTube that I apparently can't link to for some reason, but it's called: "Mission 145 - The Mysteries of the Bridgewater Triangle with Aaron Cadieux and Manny Famolare".