Farms: Great Brook Farm, MA

Enjoy a tour of the only state park in the U.S. with a working dairy farm. Tamma Duffy owns the Great Brook Farm at Great Brook State Park in Carlisle, MA. Watch as she shows visitors an amazing sight: the only robotic milking at a Massachusetts dairy farm. Her farm is very diversified -- she has an ice cream stand, and sells compost, cow manure, loam and cranberries. She explains the importance of local food.