When we went to Oz, we stopped in the Jungle near Cairns. I had already posted a message here asking for advice. Most of it came back beware of this, that and the other as our Aaussie friends love to boast about their dangerous inhabitants. Anyway we check in and my wife ask about snakes and stuff. The Aussie goes "ah don't worry about the snakes, there aren't any" "oh good" we reply. He waits a second before gleefully replying "yeh the spiders have ate them all!"
Anyway first day around the place, I saw loads of wierd coloured spiders hanging from the trees. My wife nearly had a beetle the size of her fist land on her head by the pool. The thing lay on it's back kicking it's legs and three small lizards appear from the rocks thinking "hey lunch". But even they backed off and decided it wasn't worth the effort. 
Before we went we were told to wear sandals on the beach as there are these tiny little  blue jellyfish that can give you a nasty sting if you step on them. Didn't think I'd see any, but when we went down, the beach by the water was covered in them.
Any thoughts of going for a swim were quickly discarded especially as I found a dead hammmerhead shark on the beach.
On one of the days we were walking back through the Jungle to our hut, to be confronted by a 6 ft long goanna (big lizard) strolling about 30ft from where we slept. I thought I was in Jurassic park for a moment. 
Saying all that though regardless of all these nasties, you soon forget about them.

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