Thousand Islands level year-round, and support at least two living trees. The Thousand Islands archipelago is located at the outlet of Lake Ontario at the head of the Saint Lawrence River. The region is bisected by the Canada–United States border and covers portions of Jefferson and St. Lawrence counties in the U.S. state of New York, in addition to parts of the United Counties of Leeds and Grenville and Frontenac County in the Canadian province of Ontario. Geologically, most of the islands are located where a branch of the Canadian Shield runs south across the river to join with the Adirondacks. The
Ten Thousand Islands Islands, south of Everglades City, is in Everglades National Park. The 99-mile long Wilderness Waterway begins at Everglades City and ends at Flamingo at the southern tip of the Florida peninsula. Administrative control of the islands is split between Collier County and Monroe County. The Ten Thousand Islands were used and occupied by Native Americans for thousands of years. Evidence of former living sites can be found under as much as four feet of water. A number of shell rings and other shell complexes have been identified in or adjacent to the Ten Thousand Islands. The Horr's Island archaeological site