Doubtful Sound, New Zealand has many magnificent waterfalls that crash down into the fiord below. In Doubtful Sound, as in all the other fiords, the fresh water that cascades down the mountain sides, settles as a layer of fresh water on the top of the sea water underneath. Because daylight has difficulty penetrating the two layers, due to refraction of the sunlight; and also due to the depth of Doubtful Sound; the fiord is home to many strange flora, fauna, fish and marine creatures including black coral. Keep your eyes open, and you may well see New Zealand Fur Seal, Bottlenose Dolphin, or the rare Fiordland Crested Penguins. There’s no direct road access, so the only way you can to get to Doubtful Sound is a cruise across the picturesque Lake Manapouri.