The Thousand Islands are a chain of over 1,865 islands that straddle the US-Canada border in the Saint Lawrence River between Ontario and New York. The islands range significantly in size, from large islands of over 100 square kilometers to small, uninhabited rock outcroppings that are homes to migratory waterfowl. The area is a popular tourist destination for vacationers, campers and boaters due to its fresh water recreational activities.