southern ends of the island, culminating in North Head and South Head respectively. One of these peninsulas, that between Lagoon and Caroline Bays, is a tombolo. North Head is a cliffy promontory rising to a hummock, high. Close to the westernmost point, on the peninsula separating Lagoon Bay and Henrietta Bay, the island reaches its highest point, above sea level. It is these two hummocks which give the island its name. The eastern coast is dominated by two long, generally straight beaches to the north, and a series of smaller coves to the south. Between the longer beaches and smaller coves lies an inlet, the mouth of the only river system on the island. A smaller island, Green Island, some in extent, lies off the central east coast, and another small island, Bird Island, which is about a third the size of Green Island, lies west of Ruapuke's westernmost point. Other small islets and groups of islets can be found off the coast of Ruapuke. One group of small islets, the South Islets, none of them larger than in size, lie immediately to the south of South Head, and beyond these to the southwest is the similarly sized Hazelburgh Islet group. Between Green Island and South Head is a further small group, the Breaksea Islands. Numerous other smaller rocks and reefs surround the island. See also List of islands of New Zealand List of islands Desert island References Uninhabited islands of New Zealand Islands of Southland, New Zealand Foveaux Strait Private islands of New Zealand