Kangaroo Valley NSW
This is a really beautiful area. It reminds me a little of the Numinbah valley in QLD I ride often, but only in passing as both are unique places.
I have updated this post with some new info and photos.
From Nowra NSW there is a superb ride from what is basically sea level straight up the side of the two mountains that lie to the northwest. The first particular section of road actually rides very well down hill also simply because the views are wonderful and you miss them riding up. The 2nd climb however is a road that definitely works better riding uphill and its steep and very tight.
After here you can enjoy a series of excellent tight corners that hug the ridge before arriving in the town of Kangaroos Valley itself. Now ride on though the valley proper and you will come to another steep twisty mountain climb - amazingly you will climb as much as you did previously over again to arrive in what is the high country that lies above.
However don't bother stopping at the "Australia's Best Pies" shop. Tasty enough but "Australia's Most Expensive and over rated Pies" is a more suiting title. Better food to be had in the village or towns either side of the valley.