The reservation takes its name from Thomas S. Greenwood who built the 19th-century white farmhouse. To its rear, the Paine House (1694), a yellow clapboard saltbox, is a remarkable example of First Period (1620-1725) architecture. Three generations of the Paine family made their home here, including Robert Paine, foreman of the Salem witch trial jury in 1692. From 1916, Greenwood Farm was a summer retreat for the Robert G. Dodge family, who used the Paine House as a guesthouse. Furnished with a fine collection of American furniture and decorative arts, it radiates with Colonial Revival ambiance. Recent archaeological investigations revealed a rare survival of an 18th-century milk room or dairy inside the house.

As you wander the reservation grounds on a typical summer day, you may see swallows, waxwings, and dragonflies swooping over the fields for small insects, or a red-tailed hawk riding high on a thermal. Great blue herons and snowy and American egrets wade through the marsh. Occasionally at dawn or dusk, the air quivers with the soft hooting of a great horned owl or the raspy bark of a red fox. Bobolinks nest in the fields.