Historic New England, a marvelous organization that preserves important historic houses, gardens, and properties in multiple New England states, has re-opened many of its properties for tours, and a limited number of landscaping programs. Events calendar.
A visit to any of these houses (farms, and even a castle) is so worth a summer of fall afternoon. Check Historic New England’s website for hours and be ready, of course, to observe health rules like wearing masks and keeping social distances.
In Rhode Island:
In New Hampshire: