Longest New Zealand Caves
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| Rank | Cave | Area | Surveyed Length (metres) | Unsurveyed Length (metres) | Total Length (metres) |
| 1 | Bulmer Cavern | Mt Owen | 52149 | 52149 | |
| 2 | Ellis Basin System | Mt Arthur | 28730 | 28730 | |
| 3 | Nettlebed Cave | Mt Arthur | 24252 | 24252 | |
| 4 | Megamania | Buller | 14800 | 14800 | |
| 5 | Honeycomb Hill Cave | Oparara | 13712 | 13712 | |
| 6 | Gardner's Gut | Waitomo | 12197 | 12197 | |
| 7 | Bohemia | Mt Owen | 11230 | 11230 | |
| 8 | Mangawhitikau System | Waitomo | 8054 | 350 | 8404 |
| 9 | The Metro | Charleston | 8000 | 8000 | |
| 10 | Aurora Cave | Te Anau | 6400 | 6400 | |
| 11 | Waitomo Headwaters | Waitomo | 5618 | 730 | 6348 |
| 12 | Mangaone Cave | Gisborne | 6300 | 6300 | |
| 13 | Moonsilver Cave | Upper Takaka | 5900 | 5900 | |
| 14 | Greenlink System | Takaka Hill | 5228 | 5228 | |
| 15 | Millars Waterfall | Waitomo | 5150 | 5150 | |
| 16 | Xanadu System | Punakaiki | 5010 | 5010 | |
| 17 | Fred Cave | Waitomo | 4760 | 4760 | |
| 18 | Thunderer Cave | Puketiti | 4726 | 4726 | |
| 19 | Stinkpot Cave | Mahoenui | 4548 | 4548 | |
| 20 | Windrift | Mt Arthur | 4410 | 4410 | |
| 21 | Kuratahi Cave | Puketiti | 3960 | 200 | 4160 |
| 22 | Hollywood Cave | Charleston | 3966 | 70 | 4036 |
| 23 | Te Reinga Cave | Whakapunake | 3834 | 80 | 3954 |
| 24 | Blue Creek Cave | Mt Owen | 3405 | 500 | 3905 |
| 25 | Ruakuri Cave | Waitomo | 3880 | 3880 | |
| 26 | Ecch Cave | Piopio | 3700 | 3700 | |
| 27 | Mangapu System | Waitomo | 3652 | 3652 | |
| 28 | Waipuna Cave | Waitomo | 3560 | 3560 | |
| 29 | Karamu Cave | Hamilton | 3535 | 3535 | |
| 30 | Wetneck Cave | Paturau | 3500 | 3500 |