Historic walking tours can provide a great entree into the history of a town. Of course, that means you have to be lucky enough to be able to visit - or does it?
It turns out that Killingly had digitized historic walking tours of several sections of town. Don't expect them to be interactive, since they are PDF or JPG files. They still contain a wealth of information. The Downtown Walking Tour includes photos and descriptions of each site. Westfield Village contains a map and descriptions. There's even a tour of the local rivers. If you know where your ancestor lived, this is a great source. Have fun!