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.

The south side of the island is only about one-hundred feet from the shipping channel, and cargo ships frequently pass the island. Because of the depth of the channel on one side, and the relative shallowness on the other, it is very good for sport fishing of Largemouth Bass and Northern Pike.

Wikipedia articles for Dark Island

• Dark Island
• Cedar Island State Park
• Bridge Island / Chimney Island
• Grenadier Island (Saint Lawrence River)