Introduction to Milford Sound: Milford Sound is a deep canyon created by glacial movement and cutting two million years ago. Standing on the tour boat, moving forward slowly, you can see the water from the snow-capped mountains and waterfalls on both sides flowing down. When you get to the boat, the water mist is splashing, which is cool and refreshing. In addition, you can see traces of seals, penguins and other creatures on the shore. If you are lucky, you may be able to see dolphins swimming on both sides of the boat to say hello to you!