What to expect: The hotel occupies a 55-acre estate established in 1910 as part of a collection of estates of wealthy businesspeople—such as the banker J.P. Morgan and the department-store founder F. W. Woolworth—known as North Shore Long Island's Gold Coast. Bordered by split-rail and stone fences, this estate consists of expansive lawns, century-old trees, shrubs, flower gardens, fountains, and patios furnished with wrought-iron tables and chairs.

The estate's three-story, red-brick Georgian mansion retains its original decor of dark-wood paneling, high ceilings with molded-stucco details, crystal and brass chandeliers, formal window treatments with heavy drapes, double staircase, and marble-faced fireplaces. In addition to conference planners and celebrating couples, the hotel is popular with families seeking holidays in a secluded, tranquil setting.

Amenity highlights: Complimentary recreation facilities include indoor and outdoor pools, tennis courts, croquet, badminton, and the mansion's original two-lane bowling alley. The health club includes a spa tub and a massage room. A casual pub serves hotel guests and locals as a social/activities center. It includes a jukebox, dance floor, card tables, table games, shuffleboard, big-screen TVs, and popcorn machine.

Insider tip: Movies such as North by Northwest, Sabrina, and Where's Poppa have been filmed at the Mansion.