Anyone here live in Australia can tell me where to visit if I wanted to go?

I don't, but you might specify the kind of things your looking for.

My dad's in Australia more time than he's at home anymore with his job. He's visited most of the major cities on his days off, and spent a few nights in the "outback". However, you may want to note that the country is fucking huge. There's millions of places to visit, almost an entire lifetime of traveling (much like the United States or Europe or any other continent for that matter). Probably gonna be totally up to your tastes where you go and what you see. Personally, when I go ... scuba diving off of the great coral reef.