Thousand Islands was the preferred vacation destination of many wealthy families during the late 18th and early 19th centuries and Millionaire's Row features many of the grand structures they commissioned to be built. Examples of these Gilded Age mansions are Boldt Castle constructed for hotel tycoon George Boldt, Castle Rest for railroad magnate George Pullman, Singer Castle for sewing machine innovator Frederick Bourne, Carleton Island Villa for typewriter mogul W.O. Wyckoff and Comfort Island for wealthy businessman Alson E. Clark.
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