The fun part about Australia is that the poisonous critters aren't even the most scary. The huntsman spider is a huge but generally chill dude/dame that will normally just eat other crawling bugs. But if you surprise or deliberately annoy that thing, the fucker will chase you across the room and out of the house. It won't kill you with venom, but that bite hurts.
And the way they hide..... You don't want to know the places I've found huntsman spiders. The classic example is 'clock spider'.....