The highlight of Thousand Islands is Boldt Castle...owned and designed by George C Boldt, owner/manager of Waldorf-Astoria and other large hotels...built to honor the love of his life, his wife Louise, but never completed. Seems she died suddenly and he was so heart broken that he ordered work to stop immediately. They never returned. Thousand Island Bridge Authority bought is about 10 years ago and has been working hard to restore it. You could sure tell where they had worked...and people we talked to who had been there before were awe struck. We had a fabulous time exploring...we didn't get to go to the boathouse (notice those large garage doors...so the sail boats would drive right in) or the mother-in-law house.