Things to do in 7 full days there, with own transport at disposal, suit 4 keen travellers.

Alas, or not, the road trip has been turned into a flight, BUT the time around C has been extended from 4 to 7 days

So I am aware of the "usual attractions", but I am looking for some "other" things to see and do thereabouts.
Like those lava tubes mentioned in a recent thread. Only thing is, hire vehicle has restrictions - nothing off-road,.
Also, staying in Cairns itself, but long day-trips are certainly an option.

I would be V plased to hear your suggestions.

Ta.
Am.

- - - Updated - - -

WPS! Just realised this is my 2nd thread about this.
(Also here: http://www.ausphotography.net.au/for...ing-To-The-GBR )
I have been combing the info there too, and ta to respondents. Pls add anything new in this thread.