Chatham, Massachusetts is located at the southeast tip of Cape Cod. If the Cape is viewed as a bent arm, Chatham is at the elbow. To the east is the Atlantic Ocean, to the South is Nantucket Sound, to the north is Pleasant Bay. The only adjacent town (located at both the north and west town line boundaries) is Harwich. Major geographical features of the Town are hilly, wooded uplands, extensive barrier beaches and spits, harbors, numerous small estuaries, and salt and freshwater ponds.