New Cairns aquarium should be open soon.
Waterfall tour, and volcanic crater lake is a very nice drive not far from cairns, tour with
and Cape Tribulation, Daintree
This would take too much time
The reef blocks waves on the beaches up here.
I live just down the road from Port Douglas, miles are relative in the remote outback.
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So Gold Coast for the beaches and surf.
You don't want to waste time in airports with only a week. Research flight times. I find Brisbane dull. But where I live I will often run over five snakes when it rains on the way home, whilst avoiding wandering cattle, kangaroos and wedge-tail eagles get out of the way begrudgingly whilst eating roadkill.