In the middle of New Zealand, which is famous as one of the most beautiful countries in the world, is a lake that will absolutely blow your mind. It’s known as the Blue Lake. The body of water is also recognized as Rotomairewhenua, and it holds the title of the world’s clearest lake.
Blue Lake is a small fresh water lake in Nelson Lakes National Park, in New Zealand's. Researchers of NIWA (National Institute of Water and Atmospheric Research) have found that lake has extreme visual clarity, almost up to 75 to 80 meters. The clarity of Blue Lake has passed Te Waikoropupu Springs in Golden Bay which has visibility of 60 to 65 meters. Blue Lake is considered as “Optically Clear” as distilled water. The gorgeous Blue Lake has characterized by blue-violet hues seen only in the very clearest natural waters. The blue lake is spring fed from the neighboring glacial Lake Constance, but the water passes through landslide debris that forms a dam between the two lakes. The natural dam filters out nearly all the particles suspended in the water giving the lake the most intense natural blue-violet color.
Blue Lake recognized is optically outstanding, having observed on tramping trips that this water body appeared broadly similar to Te Waikoropupu. Several specialists believe visibility of Blue Lake has exceeded that of Te Waikoropupu. Mark Gall, The NIWA scientist in ocean optics instrumentation pays many visits by helicopter established that the horizontal visibility in the lake typically ranges from 70 to 80 metres as estimated from the best available instrumental measurements in the laboratory. So Blue Lake is a close approach to optically pure water. In some rare occasions, after torrential rain, Blue Lake can become temporarily murky, when particles washed in by surface runoff have been dispersed in the water.