Oceania has a variety of rivers and waterfalls that span many climatic zones. New Zealand is known as a land of raging rivers and placid lakes reflecting great mountains. Some lakes and rivers in New Zealand are thermally heated. Australia has rivers residing in the tropic, temperate, and sub-alpine climatic regions and a surprising number of scenic waterfalls, especially in Tasmania and the south to the eastern highlands of the mainland. Some South Pacific Islands do not have any rivers and rely on rainfall for drinking water, as well as generators, wind, and solar power, for their energy requirements.