The Auckland urban area (as defined by Statistics New Zealand) ranges to Waiwera in the north, Kumeu in the northwest, and Runciman in the south. It is not contiguous; the section from Waiwera to Whangaparāoa Peninsula is separate from its nearest neighbouring suburb of Long Bay. Auckland lies between the Hauraki Gulf of the Pacific Ocean to the east, the low Hunua Ranges to the south-east, the Manukau Harbour to the south-west, and the Waitakere Ranges and smaller ranges to the west and north-west. The surrounding hills are covered in rainforest and the landscape is dotted with dozens of dormant volcanic cones. The central part of the urban area occupies a narrow isthmus between the Manukau Harbour on the Tasman Sea and the Waitemata Harbour on the Pacific Ocean. It is one of the few cities in the world to have harbours on two separate major bodies of water.