Stone Barns is the public portion of the Rockefeller's sprawling, 300-acre farm near Tarrytown. It has a public farmer's market, cafe, gift shop and beautiful pastoral views. As far as I can tell, it's the closest farm to Hudson Heights, about twenty minutes away by car.
For a unique perspective on the farm, visit this blog: www.haveyoueverpickedacarrot.com.
Or visit www.stonebarnscenter.org.