The Te Waikoropupu Springs ('Pupu Springs') are located in Golden Bay, in the Nelson Region. The horizontal visibility of the water in the springs has been measured at an average of 63 metres, a world record for fresh water. The springs are notable for the volume of water discharged from the eight main vents. It is estimated that 14,000 litres of water are produced per second, approximately enough to fill 40 bathtubs.
Ranking in the top ten freshwater diving destinations in the world, these springs have become a mecca to divers seeking the ultimate in freshwater dives. The unique natural features have created a reputation that has spread, captivating visitors from all parts of the globe.
The floor of the lake is covered with white sand. Waters expelled from some of the smaller vents carry the sand upward. These vents are known as the 'dancing sands', which for the few scuba divers who have secured permission to dive in the springs, is one of the highlights of underwater sightseeing.