Locals say you can set your clock by her. In some ways she is like the pendulum of an old clock, crossing Lake Wakatipu back and forth.
Queenstown's iconic steamship, the TSS Earnslaw, has spent the last 100 years crossing that same patch of beautiful clear water.
Next month New Zealand’s oldest working coal-fired steamship celebrates her centenary, and to mark the occasion a book's been written.
Reporter Tsehai Tiffin met some of the characters from the history of this extraordinary old lady of the lake.
Watch the video.