"Australia is comparable in size to the continental United States, but almost everyone lives on the coast. So it would be like having Los Angeles, and then New York, with almost nothing in between. Nothing except for monsters, that is. Because almost everything that lives out there in the middle of nowhere can kill you. 97% of the snakes in Australia are poisonous. The spiders are the size of washing machines, but it's the tiny ones you have to watch for. It's all teeth and venom out there. So just put a huge "here be dragons" in the middle of your mental map and you'll have a pretty good picture of Australia."