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county, southeastern Massachusetts, U.S. It is bounded by Cape Cod Bay to the north, the Atlantic Ocean to the east, Nantucket Sound to the south, Vineyard Sound to the southwest, and Buzzards Bay to the west. The county comprises the whole of Cape Cod and its satellite islands, including a band of territory northwest of Cape Cod Canal (completed 1914). This coastal lowland has many lakes and streams, notably the Herring and Mashpee rivers. Parklands include Cape Cod National Seashore, Scusset Beach State Reservation, Shawme-Crowell State Forest, and Washburn Island, as well as Hawksnest, Nickerson, and South Cape Beach state parks.