As the saying goes, ‘the world is your oyster’. There are universities and employers and projects in almost every country in the world so you are limited only by your imagination, University schedule and, of course, money.
The Australian government is currently encouraging students to spend time in Asia but Europe and North America continue to be popular destinations. When you are considering which country to go to you may like to consider Asia because of the great opportunities that are available to Australians and the relatively low cost of living. Europe and North America are much more expensive and there are many more students seeking opportunities in these countries.