One of my favorite niche forums is https://archboston.com https://archboston.com. It has years of deep-dive discussion from passionate users about the history a

One of my favorite niche forums is https://archboston.com https://archboston.com. It has years of deep-dive discussion from passionate users about the history and progress of Boston area infrastructure and real estate development projects. For a while there the site was up but not allowing new accounts to be created -- someone was paying the hosting bills but didn't have time to do any admin tasks. Thankfully, someone else stepped up and people post new stuff every day (albeit with banner ads at the top of each page now, which is honestly not too bad) I'm happy, but it could have gone poof so easily.