Once the longest railway tunnel in the southern hemisphere, this 300m long, now disused tunnel is home to a colony of small bent-wing bats. In winter up to 8,000 bats live in this tunnel.
In the summer months the number is greatly reduced as the bats leave to their breeding caves.
See where this picture was taken.
View all photos taken: Sunday, 16th December 2007, This photo: 2:29pm