Te Paki.

Cape Reinga and Te Paki are located at the northernmost area of New Zealand on the small, narrow Aupouri Peninsula, approximately 60 km north of Kaitaia. Just follow State Highway 1 north. From Te Paki onwards, follow the Cape Reinga Road.
Cape Reinga Road is an unsealed road and gets very busy over the summer months. However, September is a great month to visit this area. In fact it is a great month to visit the whole expanse of Northland. The temperatures are positively balmy! Okay, maybe not tropical but 16-20 degrees centigrade anyway. The photography details for the above image are f/10, ISO200, 1/250, -0.7EV, 95mm lens.
The Te Paki sand dunes are quite a phenomenon, they cover many square kilometers and are a great playground. To reach the dunes from Te Paki turn off Cape Reinga Road onto Te Paki Stream Road. At the end of the road there is a car park and toilet and usually a bodyboard rental van.
Hike into the dunes and have fun, the image at left was taken at 105mm,1/320th, f/5.6 and ISO200. The only drawback is that this is possibly the worst possible environment for camera gear. Super fine sand and a breeze.