Progress continues to be made on New Zealand's largest transport infrastructure project, Auckland's City Rail Link, which is due to open in 2024.
Ahead of part of the tunnel being sealed up next week, there is a public opportunity to get a glimpse at the construction going on.
City Rail Link chief executive Sean Sweeney said people have been keen to take up the opportunity this Sunday (November 17), with 10,000 tickets to the open day snapped up in 15 minutes.
The $4.4 billion project includes two new tunnels and three new stations which will enable trains to carry on from Britomart, heading up to Mount Eden, and creating a wider loop around the CBD.
"The City Rail Link in many ways is the missing link in Auckland's train network," Mr Sweeney said.
Work has been going on for about three years. But in three months time the major phase of work will begin.