Neat ride. Now I have to find that road in S. Jersey. Anybody?
A good place to start is with Google Maps. Start with roads you're familiar with, and follow them on the maps out of town and into more rural areas until you start seeing roads branching off of the main road. The twistier, the better, of course, and the map will make that fairly obvious. :) If you're lucky, Street View will have covered some of the areas you want to explore, so you might be able to use it to fix some landmarks in your mind.
If your part of the world is particularly flat, then you'll probably need to look at some topological maps to get an idea where the hills and valleys are nearest you -- that's where you're typically going to find twisties. Roads often follow the path of least resistance to natural topological features, so places with hills and ridgelines are going to be your best bet.
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