If you have the name of a city, river, or mountain and want to know where it is situated you need to use a gazetteer. A gazetteer is a list of names of places and features with their locations. To find a gazetteer in Library Search:
The GeoNames geographical database covers all countries and contains over eleven million placenames that are available for download free of charge (Creative Commons Licence).
Here is the definitive listing of Australia's communities: the country's thousands of suburbs, towns and Local Government Areas. The dictionary also covers Australia's External Territories, significant geographical features, places of historical interest, national parks and other heritage areas.