Gardner's Gut

Gardner's Gut is an extensive cave system in the Waitomo area of New Zealand. It is located in the Ruakuri Caves & Bush Scenic Reserve, an area that also contains a number of other natural features of note. The reserve is administered by New Zealand's Department of Conservation (DOC). With a length of over 12 km of explored passages, it is New Zealand's 6th largest known cave system, and the largest in the North Island.

Cave data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).