The Te Ana-au caves are a culturally and ecologically important system of limestone caves on the western shore of Lake Te Anau, in the southwest of New Zealand. They were re-discovered in 1948 by Lawson Burrows, who found the upper entry after three years of searching, following clues in old Maori legends. It later became a major tourist attraction for the area, as the part of the caverns close to the lake shore is home to glowworms. The unofficial name used by the national caving association is Aurora. The caves are geologically young (estimated 12,000 years) and hence there is only one tiny stalactite.
https://en.wikipedia.org/wiki/Te_Ana-au_Caves