Vaitaongo Cave

Vai Tango Cave is a karst cave located a short distance from Ngatiarua Village, on the island of Mauke in the Cook Islands. The cave is a cenote cave with overhanging stalactites and a deep pool used for swimming. The pool extends more than 100 metres (330 ft) back and 50 metres (160 ft) across.

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