Doubtful Sound is a popular site in western New Zealand. It is only accessed via public transportation, which includes a boat and bus ride. Then, you are on a boat in the sound. It is hard to see the scale of Doubtful Sound. This cruise ship (we saw 2 the day we were there) gives you some idea of how large it is.

We saw seals, dolphins and two penguins; the dolphins were jumping; amazing to see.

Doubtful Sound is a beautiful place to visit.