For a long time, much of what now is East Hills was home to a few wealthy families. The current neighborhood of Fairfield Park, located across from Roslyn High School on Round Hill Road, was once a polo field. The Country Estates neighborhood was formerly home to Clarence Mackay, Katherine Mackay, and their family for 30 years, beginning in 1898. Their estate was called Harbor Hill (named after the hill of the same name that it sat on). In 1924, the Prince of Wales, who later abdicated the throne of England to marry Mrs. Simpson, was entertained at the Mackay estate. Aviation pioneer Charles A. Lindbergh even rested at the Mackay estate in 1927 after returning to the United States following his historic solo flight to Paris, France. Despite the fact that the Stanford White-designed mansion was demolished prior to the construction of Country Estates, three remaining buildings from the former Harbor Hill estate still stand, and were listed on the National Register of Historic Places in 1991: Mackay Estate Dairyman's Cottage, Mackay Estate Gate Lodge, and Mackay Estate Water Tower.