DOUBTFUL SOUND More isolated than the popular Milford Sound, this fiord is sometimes known as "the sound of silence." Nearly 1,400 meters deep. Not uncommon to see wildlife such as Fiordland crested penguins, bottlenose dolphin, fur seals, etc. Not accessible by roads. Companies Go Orange (smaller tour) and RealJourneys offer day-long boat trips. $225+ NZD/adult leaving from Te Anau or Qtown.