This picture is taken at the Tor, at Waiake Beach. Rangitoto Island is on the horizon. I've timed the shot so that the last of the day light is still falling on the rocks. I didn't time the photo so well for the incoming tide. There was a bit of wading through the current to reach the beach safely.
The shot has been converted to this duotone style. The image is first made into a black and white, then the shadows and highlights tinted different tones.