Fun mini vacation close to Burlington, VT?

My friend and I are in VT for 5 days and we want to break up our time with a mini trip somewhere. We want to be close to water (lake or ocean) and not go more than 3 hours away. We will only go 1–2 nights. We can also take a ferry to the Adirondacks in NY as long as the ferries here go close (Port Kent or Essex, NY). Ideas? We are also potentially interested in going to Canada.