Голубое озеро в Новой Зеландии (Blue Lake, Rotomairewhenua)

Research undertaken by the New Zealand National Institute of Water and Atmospheric shows that the Blue Lake in the Nelson Lakes National Park is the clearest known fresh water in the world. It is thought the lake is so clear because there is almost no plant material in its source, which is Lake Constance that sits 140 metres higher than Blue Lake (see second time lapse in this clip). An ancient landslip also acts as a filter for water between the two lakes. These are some of my pictures after a two day hike