Jamestown Windmill (built in 1787). The Clancys live in the old miller's house and rent out a small cabin at the back of their property (you can see its roof behind the windmill above). The landscape is so beautiful. I cannot stress how immaculate the grounds of their property are: The plantings are thoughtful, the stone walls are perfectly stacked, the lawn is ready for its close up--even the mulch around the trees is even perfectly placed.
Rental information on AirBnB. As of this writing, there are a few summer weekends left, if you're thinking of booking a trip.