Devonport Tunnels - North Head

Devonport Tunnels - North Head Welcome to our page to discuss some of Auckland's forgotten military history and maybe even stumble upon a way into the tunnels under North Head

History

In 1870's there were rumors of a growing Russian fleet in the North Pacific and possible invasion. It was in1875, the beginning to have heavy armaments on North Head.
1880 the British Royal Engineers reported to house a battery consisting of three 7 inch and three 64-pr guns. The defensive plan continued and North Head was made into a fort with trained soldiers stationed ready for battl

e. In 1889 Fort Cautley was developing with new guns, an 8 inch disappearing gun, with a 7 inch RML and a 6-pr Nordenfelt on both northern and southern flanks of North Head. (meaning if the enemy got around the north side then the south side would also be able to attack). During the 1890's Fort Cautley was complete with tunnels, underground storerooms, Barracks, guardrooms, kitchens etc. Search light emplacements built and now the role of Fort Cautley was to stop any enemy sailing entry to the harbour of Auckland. Interestingly most of the work was done by prisoners with simple pick and shovels digging the tunnels by hand. In 1896 the minefield was laid extending from North Head across the inner harbour, a generator room can still be found on the south side to provide the power to detonate the mines. The turn of the century North Head was heavily fortified but the Russian invasion did not eventuate and it was decided to dismantle the guns at that time. Almost all of the guns were sold for scrap metal. Some say that several are still buried into the side of the hill. One gun is known to be at Newmarket in Auckland pointing down the main street. Then in 1933, the government decided to reconstruct North Head of new batteries. Work began in 1935 with three new search light emplacements and emplacements for 4 inch guns at North Battery. It was till 1941 when Japan entered the Second World War that the defences were scaled up and guns were camouflaged in anticipation of active service. Alarms and telephone communications around the Head were also upgraded. Transport and haulage of all equipment around North Head was done by means of horses as well as motor vehicles in later years. This was quite a sight to see, as horses and man power hauling parts up the mountain and then assembling a ten-tonne gun. As the invasion did not happen, the only shots fired from North Head where for either practice purposes or as salutes to the Queen when she arrived. At the end of the war North Heads evolution to this day has turned into a reserve. Now run by Department of Conservation, the tunnels today are still in place and well worth a good look around, especially the south battery which is still housing a disappearing gun. Stories are told that there are 2 planes from the war buried inside. In the mid nineties the Army was called in to jack hammer and try to find these planes supposedly in the hill. Local residents where told possible ammunition still fully charged could go off at any time, but nothing was found after several weeks work. Many of the tunnels now days are blocked and the public can only go so far. Take a look around there are numerous places to explore. ( not so much anymore )

correction: the second investigation (there was an earlier army investigation in the 70's) was actually in 1988, and it wasn't they didn't find anything as lieutenant Simon Maindonald would wander off whenever something potentially interesting was discovered and when he returned he directed the Army engineers (he was commanding) to move to another area

01/06/2026

What if……?

24/05/2026

Front view of a twin, 6 pound coastal defence gun at Fort Dorset, Wellington, New Zealand. 1941. (National Archives of New Zealand)

19/05/2026

A new shuttle is planned from a bay directly to the historic reserve to bring tourists.

Even the French are dealing with the left overs from the war
17/05/2026

Even the French are dealing with the left overs from the war

After WWI, France deemed 1,200 square kilometers of its own land entirely unfit for human life. Over a century later, this jagged scar—the Zone Rouge—won't be safe for another 700 years.

The story of the Red Zone is rooted in the unprecedented scale of artillery warfare on the Western Front. During prolonged engagements like the Battle of Verdun, the landscape was subjected to relentless bombardments. Entire villages were pulverized, and the ground was churned into a chaotic wasteland. When the war ended, the French government realized that rebuilding these areas was immediately impossible. The land was saturated with human and animal remains, and the physical geography of the terrain had been completely destroyed.

The primary reason the Red Zone has not been fully cleaned up is the staggering density of unexploded ordnance. Historians estimate that artillery units fired over one billion shells during the First World War, and roughly 30 percent of them failed to detonate upon impact. Today, these dormant explosives regularly surface in French and Belgian farmland during spring plowing—a phenomenon known locally as the "iron harvest." The French Département du Déminage (Department of Mine Clearance) recovers hundreds of tons of munitions every year. However, at the current rate of extraction, authorities estimate it will take centuries to clear the remaining explosives.

Furthermore, the danger is not just explosive; it is highly toxic. World War I introduced chemical warfare on an industrial scale. Unexploded shells are still leaking mustard gas, phosgene, and chlorine into the earth. Even conventional munitions heavily contaminated the soil with heavy metals. In some of the worst-affected pockets of the Red Zone, the soil contains arsenic levels up to 10,000 times higher than natural baselines, alongside extreme concentrations of lead, mercury, and zinc. In these localized dead zones, plant life struggles to survive, and groundwater remains severely polluted.

Over the past century, the French government has managed to surface-clean and shrink the Red Zone from its original 1,200 square kilometers to about 100 square kilometers today. The remaining heavily contaminated areas have been planted with thick pine forests to stabilize the soil and keep people out. Scattered throughout these woods are the ghosts of nine destroyed towns—such as Fleury-devant-Douaumont—which were intentionally left in ruins. They are officially designated as "villages that died for France," serving as permanent memorials to a landscape irreparably altered by war.

I enjoy seeing videos of other disappearing gun emplacements as the layouts could possibly show where there are hidden t...
16/05/2026

I enjoy seeing videos of other disappearing gun emplacements as the layouts could possibly show where there are hidden tunnels at North Head.

I am disappointed in Auckland Transport at the destruction of this history.
26/04/2026

I am disappointed in Auckland Transport at the destruction of this history.

23/04/2026

Back in the 1880s as global tensions grew between England and Russia, the New Zealand government purchased land at Taurarua/Point Resolution for fortification in the event of any troubles. Along with Australia, panic over a potential Russian invasion was real, so much so that the fortifications were hastily constructed: at Point Resolution, they were put up by the Armed Constabulary. Fortunately, no shots were fired in war, and the fort was abandoned in 1904. A charming picnic spot, with its wonderful views over the harbour, Fort Resolution was levelled in 1914, around the time the Parnell Baths were constructed. Besides the Fort, the site was also famous for the White Heron Lodge, Auckland's playground of the rich and famous in the 1960s and 70s.
Photographer: Marsh, Douglas Jerome, 1915-1996
Image reference: Auckland Libraries Heritage Images 1334-16-16

20/04/2026

We need to remember the coast watchers of the Pacific

18/04/2026

In April 2026 Stony Batter Tunnels will close and the tenure of Tim Moon as custodian and guide will come to an end. Tim first become involved with Stony Batter Tunnels a decade ago, running guided walks as part of the Waiheke Walking Festival and then picking up full-time management and operation. This conversation is from Tim's early days of involvement in December 2017. https://www.waihekeradio.org.nz/podcast/tim-moon-stony-batter-tunnels

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Devonport
Auckland
0624

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