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Location: Garrison, N.Y.
Price: $7,250,000
The Skinny: Built in 1919 by society architect Hall Pleasants Pennington for railroad tycoon Frederick Henry Osborn, Sr., Cat Rock has been owned by Osborn’s descendants ever since. Now, 94 years later, the impressive stone pile and accompanying 120 acre estate have finally returned to market, asking $7.25M. The 10,000-square-foot, castle-like house boasts nine family bedrooms, four staff bedrooms, eight bathrooms, and plenty of original detail, while the grounds include formal gardens by legendary landscape designer Ellen Biddle Shipman, plus “a writer’s cottage, carriage house with guest apartment, swimming pool, tennis court, riding stables, formal gardens, and two other houses on the almost mile long driveway.” Best of all, for fans of open spaces, the estate’s grounds are protected by conservation easements and will not be subdivided or further developed.

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· Cat Rock [Sotheby’s International Realty]