Tony,
As Tom Paul said, it is like playing golf amidst a garden while also surrounded by gardens all high atop the Hudson River. There are a number of formal gardens including the inner walled Italian gardens by William Welles Bosworth (MIT and Ecole des Beaux Arts), a Japanese garden (with a beautiful teahouse), rose garden, morning garden, orange tree garden and a brook garden. The estate has an impressive collection of classical sculptures and modern sculptures by Noguchi, Lippincott, Liberman, Calder, Picasso, Moore, Brancusi among others.
The greens, which were small to begin with, have gotten much smaller over time. They encourage precise iron play and have a great deal of slope.