Top 10 Caves in New Zealand
New Zealand's cave systems are concentrated in the Waitomo region of the North Island and in the Karamea and Takaka Hill areas of the South Island's northwest. The country's most internationally famous caves — the Waitomo glowworm systems — are known for Arachnocampa luminosa, a bioluminescent gnat larva endemic to New Zealand and eastern Australia whose larval phase creates the characteristic blue-green ceiling-light effect. But New Zealand also contains deep vertical shaft systems and long horizontal mazes that place it among the world's serious caving destinations.
All caves here are on the cave map.
1. Waitomo Glowworm Caves, Waikato
Karst cave. The Waitomo Glowworm Caves are New Zealand's most visited cave attraction, receiving over 400,000 visitors per year. The cave system was explored systematically from 1887 by local Maori chief Tane Tinorau and British surveyor Fred Mace, and opened as a guided tour in 1889. The boat ride through the Glowworm Grotto — a large chamber whose ceiling is covered in thousands of Arachnocampa luminosa larval bioluminescent threads — is the centrepiece. The surrounding Waitomo cave district extends far beyond the show cave; over 300 caves are catalogued in the Waitomo catchment. Black-water rafting through inner passages and abseil tours into the shafts above are offered as adventure options. Tour grade A (show cave), B-C (adventure tours).
2. Ruakuri Cave, Waitomo
Karst cave. Ruakuri is the longest cave in the Waitomo system accessible to tourists, with a 1.6-kilometre underground spiral ramp and footbridge circuit that avoids disturbing the ancient Maori burial site at the cave entrance. The cave contains an underground stream, a natural tunnel, whirlpool potholes, and glowworm colonies in its upper sections. The cave's name means "den of dogs" in Maori and relates to wild dog packs that historically sheltered near the entrance. Operated by the same company as Waitomo Glowworm Caves; the two are often combined as a day itinerary, with a minibus shuttle between sites. Tour grade A.
3. Aranui Cave, Waitomo
Karst cave. The smallest of the three main Waitomo show caves, Aranui is notably dry and contains the most elaborate speleothem formations in the district — stalactites, stalagmites, cave coral, and delicate stalactite straws in formations that are particularly dense and well-preserved because the cave has no stream flow to disturb sediment. Guided tours are smaller and slower-paced than the Glowworm Cave. Tour grade A.
4. Te Anau Glowworm Caves, Fiordland
Karst cave. On the shores of Lake Te Anau in Fiordland, the Te Anau cave system was discovered in 1948 by surveyor Lawson Burrows. Visitors reach the cave entrance by boat across the lake, a crossing of approximately 30 minutes through the fjord landscape. The cave contains rushing underground streams, whirlpool potholes carved by the action of river gravels, and glowworm colonies in its upper dry chambers. Unlike the Waitomo caves, which are accessible by road from Hamilton, Te Anau Glowworm Caves require the lake crossing, which adds a context — the fjord, the mountains, the stillness — that distinguishes the visit. The cave is within Fiordland National Park (UNESCO World Heritage Site, Te Wahipounamu). Guided tours only; access by boat from Te Anau town. Tour grade A.
5. Honeycomb Hill Cave, Karamea
Karst cave. Honeycomb Hill in the Karamea area of the northwest South Island is one of New Zealand's most significant palaeontological cave sites. The sediments contain the most complete collection of moa bones (all nine extinct moa species represented) and other extinct New Zealand bird species including Haast's eagle (Hieraaetus moorei), the largest eagle ever to have existed. The fossils are preserved in cave sediments that accumulated over thousands of years as birds fell or were taken into the cave by predators. The fossils date from the period before Polynesian settlement, which provides a baseline record of the avifauna prior to human hunting. The surrounding Oparara Basin contains limestone arches and karst features accessible via the Oparara Valley walk. Guided trips by specialist cave guides only; not a developed show cave but accessible to fit visitors. Tour grade B.
6. Harwood's Hole, Takaka Hill
Karst vertical shaft. Harwood's Hole near Takaka on the northern South Island is the deepest natural vertical shaft in New Zealand at approximately 176 metres — a single-drop pitch from the surface into a cave passage below. It was first descended in 1958 by a New Zealand Speleological Society team using rope and ladders. The cave system below the shaft connects to the Nelson Cave system. Experienced SRT cavers only; requires rigging equipment and permits. Tour grade C.
7. Nettlebed Cave, Kahurangi National Park
Karst cave. Nettlebed on Mount Arthur in Kahurangi National Park is one of the deepest caves in the Southern Hemisphere at approximately 889 metres depth. The cave was first entered in the 1960s and has been progressively extended by New Zealand Speleological Society expeditions; the deepest sections require multi-day underground camps. Not accessible to casual visitors; serious expedition caving only. Its depth ranks it among the deep cave systems of global significance.
8. Bulmer Cavern, Kahurangi National Park
Karst cave. Bulmer Cavern on Mount Owen in Kahurangi National Park is the longest cave in New Zealand at approximately 67 kilometres of surveyed passage, making it one of the longest caves in the Southern Hemisphere. The cave has been explored progressively since 1980 by NSS-NZ and international expedition teams. Surface access to the Mount Owen plateau requires a helicopter flight; the cave interior requires multi-day camps. Like Nettlebed, Bulmer is a serious expedition destination.
9. Cathedral Cove Sea Cave, Coromandel Peninsula
Sea cave. Cathedral Cove — Te Whanganui-A-Hei — on the Coromandel Peninsula is a large sea arch and coastal cave complex accessible by boat or by a 35-minute walk from the car park above. The main arch connecting two beaches is the defining feature; smaller sea caves accessible at low tide by kayak run into the rhyolite cliffs. The Cathedral Cove area was a filming location for The Chronicles of Narnia: Prince Caspian. The cave is within the Te Whanganui-A-Hei Marine Reserve. Tour grade A.
10. Riwaka Resurgence, Takaka Hill
Karst cave (cave diving). The Riwaka Resurgence at the base of Takaka Hill is the outlet point of the massive karst drainage system beneath the hill — a gushing stream emerges from a cave mouth after a course that includes the Harwood's Hole shaft system. The volume of water emerging from the resurgence is remarkable; in wet weather the cave breathes visibly with changes in water level. The resurgence pool is a celebrated cave-diving site; surveys by New Zealand cave divers have extended mapped passage several hundred metres beyond the visible entrance. The cave's connection to Harwood's Hole through the mountain is geologically confirmed by dye-trace experiments. Cave-diving access only beyond the entrance pool; the resurgence and its surroundings are a registered scenic reserve. The short walk to the resurgence from the road is accessible to all visitors.
Planning a New Zealand cave trip
The Waitomo caves district is the most visitor-ready cluster: Glowworm Cave, Ruakuri, and Aranui can be combined in a single day from Hamilton or Rotorua. Karamea in the northwest of the South Island is more remote — a day's drive from Nelson — but Honeycomb Hill and the Oparara karst repay the effort. Takaka Hill is convenient from Nelson as a day or half-day trip, with Harwood's Hole for experienced cavers and Riwaka Resurgence for all visitors. Te Anau Caves fit naturally into any Fiordland itinerary.
Cave temperatures in New Zealand's show caves range from about 9°C (Ruakuri stream sections) to 18°C in more sheltered chambers; a mid-layer is always worth carrying even in summer.