Man O' War Vineyards

Stony Batter Tunnels: A Journey Through Waiheke's WWII Legacy

Tucked away on the remote eastern edge of Waiheke Island lies one of New Zealand's most fascinating military heritage sites: the Stony Batter Tunnels. Part engineering marvel, part historical archive, and part underground adventure, this WWII-era fortress offers visitors an immersive step back in time while surrounded by some of the island’s most spectacular coastal scenery.

Historical Significance

The story of Stony Batter begins in the early 1940s, when the fear of a Japanese invasion prompted the New Zealand government to strengthen coastal defences. Constructed during World War II, the site was intended to serve as a critical link in Auckland’s defence network, with its location chosen for the commanding views over the Hauraki Gulf and the strategic access it offered.

Work began in 1943, involving the excavation of more than 1.2 kilometres of tunnels and chambers using methods adapted from railway construction. It was a labour-intensive project, built primarily by hand with picks, shovels, and dynamite. The site was to host three 9.2-inch guns, but only two were ever installed—and none were fired in combat. The war's end in 1945 rendered the fort obsolete, and it was decommissioned shortly after, lying dormant for decades.

Architectural and Engineering Marvel

Despite never being activated in battle, the Stony Batter Tunnels are a stunning example of mid-century military engineering. Descending up to seven storeys underground, the network includes gun emplacements, ammunition stores, plotting rooms, communications hubs, and reinforced bunkers designed to survive bombardment. The tunnels are broad, high-ceilinged, and extremely well-ventilated, reflecting their planned use as a long-term defensive stronghold.

The design borrowed heavily from techniques used in New Zealand’s early railway tunnels, with a focus on structural integrity and sustainable air flow. Thick concrete reinforcements, vaulted ceilings, and minimal lighting give visitors a striking sense of stepping into the past.

Restoration and Public Access

For years the tunnels remained sealed off, visited only by adventurous locals. In 2020, Fort Stony Batter Heritage Park Ltd. began a full restoration effort, ensuring the tunnels were safe, accessible, and interpretively rich. Today, the site is open to the public for guided tours, complete with historical displays, restored rooms, and stories from both wartime operations and the years of restoration.

The tunnels now serve as both a museum and a venue for local art and cultural events. Some chambers have been repurposed to host exhibitions, musical performances, and even historical re-enactments. These additions make the experience dynamic and layered, appealing to a broad spectrum of visitors.

Getting There

Reaching Stony Batter is an adventure in itself. The eastern end of Waiheke Island is rugged and relatively undeveloped, but that's part of the appeal. From Matiatia Ferry Terminal, the drive takes approximately 40–50 minutes. The route winds through farmland, native bush, and scenic coastline.

For those without a car, the Eastern Explorer Bus runs Wednesday through Sunday, syncing with morning ferries from Auckland. This hop-on hop-off service provides a scenic ride across the island, ending at Man O’ War Bay with a transfer to Stony Batter.

An increasingly popular option is the direct ferry to Man O’ War Bay, which operates during the high season. From there, it's a 30-minute walk or short shuttle to the entrance of the historic reserve.

Opening Times and Tour Information

• Opening Hours: Wednesday to Sunday, 10:30 AM to 4:00 PM.

• Tours: Guided tours run roughly every 30 minutes and last about 60–75 minutes.

• Booking: Recommended in advance, especially during weekends and school holidays.

• Accessibility: The tunnels are spacious, but not fully wheelchair accessible due to some uneven surfaces and slopes.

• Admission: Modest fees apply, which contribute directly to site maintenance and restoration.

What to Bring

• Comfortable walking shoes

• A jacket or warm layer (the tunnels maintain a cool temperature year-round)

• Water and snacks (there is no café on site)

• A camera (photography is allowed, though flash is discouraged in certain areas)

What Else to Do Nearby

Visiting the tunnels is only part of what the eastern end of Waiheke offers:

Stony Batter Walking Track

A scenic 4 km loop winds through volcanic boulders, native bush, and panoramic viewpoints. Informative signs along the way explain the area's geology, birdlife, and wartime context. It's a moderate walk suitable for most fitness levels.

Opopo Bay Track

This lesser-known 1.2 km walk descends through quiet forest to a secluded gravel beach. It’s ideal for picnics and offers excellent opportunities for birdwatching and swimming in calm waters.