Sydney
Sydney lies on a drowned coastline on the east coast of New South Wales, where the ocean level has risen up to flood deep river valleys carved in the Sydney Triassic sandstone, which was laid down about about 200 million years ago. Sydney has over two major regions: the Cumberland Plain, a mostly flat region lying to the west of Sydney Harbour, and the Hornsby Plateau, a tableland north of the Harbour. Sydney's native plant species are mostly eucalyptus trees,  and its soils are red and yellow in colour. Sydney has nine rivers and just over a hundred creeks.