If you're interested in hydro structures, you can pop by Island Pond Dam; getting to Dead Brook from Island Pond is simple. Whohoo, so many entertaining things in one place! Island Pond is great! Island Pond is nice enough to spend more than a day at, Idle Times Campground is a nice local campground. Monadnock Inn is a pleasant place to get some rest; a great site to camp here at Island Pond is Seven Maples Campground.
What would winter be without some skiing at Mount Sunapee, and some of the water nearby flows, like Decul Brook. This lake is so wonderful.