Introduction to Milford Sound: Milford Sound is known as the "eighth wonder of the world" and is the most important attraction in the Fiordland National Park. The fjord is a place submerged by the ocean. U-shaped glacier canyon. The 14 fjords lined up along the southwest side of the South Island were formed 100,000 years ago, and the most recent glacial activity, which occurred 10,000 years ago, fixed the fjords into their current topography. Visitors can choose to take a boat tour. The Milford Sound mountain has been eroded by 1,000 meters of vertical glaciers. Whether you look up at the glacier cliffs on the boat or overlook the steep and steep Miter Peak from the air, it is a unique beauty. Milford Track is known as "the best hiking route in the world".