We picked up our sack lunches and boarded the ferry across Lake Manapouri to the power station. There was a light drizzle falling, so most of us stayed inside the ferry, going out only for pictures. We got to the other side of the lake, climbed into a bus, and took a short trip down inside a huge, solid granite mountain, where somebody decided to put a power station. The tunnel we drove down was a 2Km long spiral that ended 200 meters below the surface of the lake.