Starting with the obvious. The Big Apple is an hour south by train or 45 minutes by car. If you're going to drive, we recommend booking parking ahead of time.
Westchester County is the site of many historic 18th and 19th century mansions. These include Kykuit, the former Rockefeller Estate; Lyndhurst, one of America's finest gothic mansions; and Van Cortlandt Manor, dating from the time of the Revolution.
At Washington Irving's home of Sunnyside and the nearby town of Sleepy Hollow, take a trip back to America's early years in stories and history.