Boldt Castle: Stunning Gilded Age Island Landmark in the Thousand Islands

Discover Boldt Castle, a lavish turn-of-the-century mansion on Heart Island in the St. Lawrence River, just 25 km from Gananoque. Located in the U.S., a valid passport is required for your visit. Built by George C. Boldt, original proprietor of New York City's iconic Waldorf Astoria Hotel, this architectural gem draws visitors worldwide.
Many Thousand Islands cruise tours include a stop here. Alternatively, drive 23 km from Gananoque to Alexandria Bay, NY, USA, and take a 10-minute shuttle across the 1 km waterway to the castle.
Access from the Thousand Islands Parkway via Hwy 137/81 over the Thousand Islands Bridge (border crossing) leads to Alexandria Bay. Canadian cruises depart from Gananoque for a comprehensive five-hour tour (cruise and castle visit) or from Rockport for 3.5- or five-hour options.




