This Gothic gem was (partly) built by George C Boldt, a Prussian immigrant who rose to the uppermost class by managing Manhattan’s Waldorf-Astoria hotel in the late 19th century. Midway through construction, Boldt's wife died suddenly, and the project was abandoned. One floor has been finished the way Boldt intended; the rest is a ghostly monument.
Access to the castle is by boat (additional fee) from Clayton or Alexandria Bay.