Sight · Fiordland National Park
Boat-access glowworm grotto with rushing river and limestone
Overview
Hidden on the western shore of Lake Te Anau, the Te Ana-au Glowworm Caves are a young, still‑forming limestone maze where an underground river roars below a ceiling of bioluminescent glowworms. You’ll cross the lake by boat, step into cool, echoing chambers, and then drift in silence into a pitch-black grotto that feels like stargazing underground.
Geologically young (around twelve thousand years) and still being carved by the Tunnel Burn Stream, the cave is more dynamic than most—think flowing water and fresh-cut passages rather than static formations. The Māori name Te Ana-au refers to swirling or rushing waters, which you’ll hear the moment you step inside.
Parkwolf’s verdictWhy It’s UniqueMap
Local know-how
Book ahead, especially in summer and for evening departures.
Wear non-slip shoes and bring a warm layer; the cave stays cool.
Expect strict no-photos and silence in the glowworm boat.
Tours can be canceled after heavy rain; keep plans flexible.
Pick late-morning or early-afternoon slots to avoid peak crowds.
Plan your stop
The highest, rockiest slopes around here are a summer buffet for grizzly bears.
Fiordland Tour Guide
Parkwolf is a GPS audio tour guide for Fiordland National Park. As you drive, it chimes in with what’s ahead: hidden gems, upcoming stops, history, geology, and wildlife, right through your car’s speakers.
See the Fiordland audio tourMore stories near here in the app
“Fantastic app with many points of information… It’s great to just turn on while you’re driving and it gives you an audio tour of the national Park. We love it!!!!”
Guide
The headline act is Arachnocampa luminosa, New Zealand’s native glowworm. Their blue-green glow lures prey, and in the dark grotto the effect is a galaxy of tiny lights. You might spot birdlife on the lake, but the wildlife focus here is entirely underground.
If you’re drawn to singular, only-in-New-Zealand experiences, yes—this is a memorable detour that pairs a lake cruise with a genuinely magical cave moment. Just go in knowing it’s a guided, tightly run operation and the glowworm viewing is intentionally short and silent.
Wildlife
1,181 sightingsKeaMost seen around 10 AMSighting map
199 sightingsFiordland PenguinMost seen around 7 PMSighting map
228 sightingsBlue DuckMost seen around 5 PMSighting map
32 sightingsBottlenose DolphinMost seen around 5 PMSighting map
247 sightingsNew Zealand Fur SealMost seen around 6 PMSighting map
58 sightingsKākāMost seen around 6 PMSighting mapSighting maps show where each species has been reported across Fiordland. Wildlife moves, so no sighting is guaranteed.
Parkwolf’s Fiordland ranking
The audio tour guide for the drive, plus offline maps, trails, and wildlife heatmaps for when the signal drops.
