The Te Waikoropupu Springs are located in Golden Bay, on New Zealand's South Island. The springs are known for the clarity of the water, and the volume of water discharged. The springs are spiritually significant to the Māori people.Water clarityThe horizontal visibility of the constantly 11.7 °C cool water in the springs has been measured at an average of 63 metres, and until 2011 was considered second only to sub-glacial water in the Antarctic. Since that year, however, the record holder for fresh water clarity is the Blue Lake (Tasman) still in New Zealand.Volume of waterThe 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. In a 1974 television documentary, it was noted that this would be enough water to supply a city the size of Boston, Massachusetts. 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.Spiritual significanceThe Springs have been registered as Wahi Tapu with the Māori Heritage Council of Heritage New Zealand. Waikoropupu is the legendary home of the female taniwha, Huriawa, one of the three main taniwha of Aotearoa. She is a diver of land and sea, travelling deep beneath the earth to clear blocked waterways. She is brave and wise and believed to still rest in the waters of Waikoropupu, when she is not away attending to business.