Located in Nelson Lakes National Park, Blue Lake?also known as Rotomairewhenua?holds the title of the world’s clearest lake. Scientific tests carried out in 2011 by New Zealand’s National Institute of Water and Atmospheric Research (NIWA) showed Blue Lake to be the clearest natural body of fresh water known to man. According to the NIWA research results, visibility in the lake is up to 80 metres (262 ft) – meaning the water is considered almost as “optically clear” as distilled water.
All images courtesy of Klaus Thymann of Project Pressure and supported by the Department of Conservation, NIWA and Tourism New Zealand
Blue lake is characterised by blue-violet hues seen only in such clear natural waters. Part of the Nelson Lakes National Park conservation area in the northern South Island, Blue Lake is fed by waters from nearby Lake Constance.
The park is a popular hiking and…