Okaihau Branch
The Okaihau Branch, sometimes known as the Kaikohe Branch and rarely the Rangiahua Branch, was a branch line railway that joined the North Auckland Line of the national rail network of New Zealand at Otiria.
It was the most northerly line in New Zealand and was intended to run all the way to Kaitaia.
It opened to Okaihau in 1923 and closed in 1987.
An overview of the Okaihau Branch is available on Wikipedia here
The South Portal of Tunnel Number 1 on the Okaihau Branch
Photo by Anthony851
The Okaihu Express ( an old folk song by Peter Cape )