Some comments 

Cant help myself ;-) 
You may want to look into adding about the Poestenkill Gorge (where the High Falls are) and the legend of the Native American who "kidnapped" a white girl and "married" her and hid out in a cave there along with some history of the various mills. You may want to talk about the gorge in the geography section. There are so many beautiful dams that today create lakes and waterfalls of their own you may want pictures of them too, Lake Ida behind the Stewarts at 2 and 66, with several very old dams along the Poesten kill within walking distance of there.
It would be tresspassing technically but there's a great waterfall on par with the ones you have pictures of (I think its called Fred's Hole or something like that?) out past Tamarac schools on Route 2, driving east there's an old abandoned bridge on the left past where the falls are, if you park there and walk over the bridge and follow the paths back the way you came you'll reach after about a 2 or 3 minute walk the top of the falls. I dont know if kids still go there and jump off the waterfall, but I went there once when I was 17 (all for a girl of course). If you cant get there that way there should be an official looking town-owned building before you get to the bridge, it sits (I believe) roughly right before where the falls and there should be a path from it to the bottom of the falls.