Australia, officially the Commonwealth of Australia, is a country located in the continent of Oceania consisting of six states and two territories. In it, this country is the largest of all.
Thomas visited this country in Really Useful Around the World when he was taking some passengers from Adelaide to Darwin. But then he heard an unusual sound while going along the tracks and could not tell what it was. Thomas made it to Darwin when he heard the strange sound and found that it came from a man playing a didgeridoo at the platform.
Thomas also visits the country in his world tour and meets Isla.