Hollow Brook Farm, in the Canaan Valley in Connecticut, was one of the residences of Bob and his second wife Elisabeth "Buffy" Harkness.
Welcome to Hollow Brook Farm, a privately owned, Connecticut Land Trusted "gentleman's farm" in historic Canaan Valley. Originally an 18th Century land grant and for many years the country estate of the actor Robert Montgomery, Hollow Brook Farm encompasses over two hundred acres of fields and woods of exceptional beauty with a classically styled and furnished main house of noted architectural merit.
Digging a bit further, a cottage on the land is available for seasonal rental. Photos and details are available here.
It appears that the entire estate went up for sale or sold in 2003 for $2.8 million, less than the asking price of $3.5 million. Information on the sale of the farm, including many photos, can be found online.