For those of you that don't know where' Boston get's it's water from, and even those that do, this documentary is put together pretty well. As a point of interest to me... part of my house was once a Quabbin home. They moved it before they flooded the valley. There are LOTS of gorgeous hiking trails throughout the property. I've barely even scratched the the beginning of what's available here.
http://video.wgby.org/video/2365046325/