 The state's borders include a water boundary in (clockwise from the west) two Great Lakes (Lake Erie and Lake Ontario, which are connected by the Niagara River); the provinces of Ontario and Quebec in Canada, with New York and Ontario sharing the Thousand Islands archipelago within the Saint Lawrence River, while most of its border with Quebec is on land; it shares Lake Champlain with the New England state of Vermont; the New England state of Massachusetts has mostly a land border; New York extends into Long Island Sound and the Atlantic Ocean, sharing a water border with Rhode Island, while Connecticut has land and sea borders.Except for areas near the New York Harbor and the Upper Delaware River, New York has a mostly land border with two Mid-Atlantic states, New Jersey and Pennsylvania.New York is the only state that includes within its borders parts of the Great Lakes and the Atlantic Ocean.