Once, when my friend A. came to visit me, I drove her to Auckland university and by accident, we drove to a very crooked road. This is unknown because it is a small one way road through the middle of the park, the Feijoa forest near the Justice building, and it didn't count because they blocked off the end of it. It required great skill to drive down the slope.
We felt sheepish when we came home.
Years later, the water engineer and I walked there and I told him about the road. The crooked road was in the patch of forest by the Alten Road. Zoom in the map and you can see it.