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Location: Gladstone, N.J.
The Skinny: This sprawling stone pile, first designed by noted estate architect Grosvenor Atterbury in 1906, was originally known as Hillandale and served as the country home of sugar baron George R. Mosle. In 1926, it was purchased by the Sisters of St. John the Baptist, a Catholic order, who converted the property into use as an orphanage and later as a summer camp and school. While the varying functions brought significant additions to the house, including a sizable barrel-vaulted chapel, much of the original detail has been maintained, with highlights like the original wood-lined pantry and an imposing stone porch. Now, with much of the original land having been preserved as a public park, the manor house and the surrounding 30 acres have been listed for $5M. In need of work, of course, but with authentic pedigree to spare.