Dark Island, a prominent feature of the St. Lawrence Seaway, is located in the lower (eastern) Thousand Islands region, near Chippewa Bay. A historic landmark here, "The Towers" was long known as Dark Island Castle until recently renamed "Singer Castle". The island itself sits only a few yards south of the Canadian-United States border that runs along the river. Because of its proximity to Canada, it was used for rum-running during prohibition in the United States. Dark Island Castle was the last of several "castles" built in 1905 by the president of the Singer Manufacturing Company and was modelled on Scottish castles described in novels of Sir Walter Scott. The mansion was used for rum-running during Prohibition.
There are no cruises currently listed for this port of call.