Te Anau Glowworm Caves Guided Tour

Te Anau, the gateway to Fiordland

Te Anau is a small lakeside town in the south-west of the South Island and the main base for exploring Fiordland National Park, the largest national park in New Zealand. It sits on the eastern shore of Lake Te Anau, with the mountains of the park rising across the water. Most visitors stay here for Milford Sound and Doubtful Sound, and the glowworm caves are the perfect short trip for an afternoon or evening in town.

If you are asking how to get to Te Anau, it is about two hours' drive from Queenstown and roughly two and a half hours from Invercargill. The tour starts at the visitor centre at 85 Lakefront Drive, a short stroll from the town centre and most hotels. The town itself has a pleasant lakefront, shops and cafés, and a bird sanctuary just outside where you can see the rare takahē.

The cruise across Lake Te Anau

Lake Te Anau is the largest lake in the South Island by area and the second largest in New Zealand, carved by glaciers during the ice ages and reaching depths of over 400 metres. The cruise to the caves takes about 30 minutes each way, crossing the open lake towards its untouched western shore, where dense beech forest climbs straight up from the water.

From the deck you see the three long arms of the lake reaching deep into the mountains, and the peaks of the Murchison and Kepler ranges. There is no road to the caves, so the boat is the only way in, which adds to the sense of adventure. On the evening departures you cross the lake in the soft light of dusk and return under a darkening sky.

Inside the Te Anau Glowworm Caves

The caves lie in the foothills of the Murchison Mountains and are only about 12,000 years old, very young in geological terms. They are still being shaped by the river that flows through them, and the result is a twisting network of limestone passages with sculpted walls, swirling whirlpools and a powerful underground waterfall. The Māori name of the area, Te Ana-au, is often translated as the cave of swirling water.

Before going underground, you visit displays at the cave entrance that explain the geology. Then your guide leads you along walkways and steps through the passages, sharing the history of the caves and the legends that helped explorers rediscover them in the twentieth century. Some sections have low ceilings, so a reasonable level of agility is needed. Is the Te Anau glowworm caves tour worth it? It is one of the most magical experiences in Fiordland.

The hidden glowworm grotto

Deep inside the cave, beyond the roar of the water, you step into a small boat and drift in total darkness into a silent grotto. Overhead, thousands of glowworms shine like a starry sky. These are the larvae of a fungus gnat found only in New Zealand; they glow with a blue-green light to attract tiny insects into sticky silk threads that hang from the ceiling.

The boat is guided along in complete silence so as not to disturb them, and the effect is unforgettable. Photography is not allowed inside the caves, to protect the glowworms and keep the experience calm for everyone, so simply enjoy the moment. Because the grotto is always dark, the glowworms look just as bright on a morning departure as in the evening.

The Murchison Mountains and Fiordland wilderness

The caves sit at the edge of the Murchison Mountains, a protected area of Fiordland where the takahē, a large flightless bird once thought extinct, was rediscovered in 1948. Access to the mountains themselves is restricted to protect the birds, so the cave tour is one of the few ways visitors can set foot on this wild shore of the lake.

Around the cave entrance building you may notice the clean air, native beech forest and birdsong typical of Fiordland. The best time to visit the Te Anau glowworm caves is any time of year, since the caves are unaffected by weather; summer evenings are popular, while winter departures make a cosy activity after a day at Milford Sound.