Blue Lake (Rotomairewhenua in Māori) is a small lake in Nelson Lakes National Park, in the northern reaches of New Zealand’s Southern Alps. Sacred to local Māori, it has the clearest natural fresh water in the world.Photo credit: flickr – The lake has extremely clear water, and is the clearest natural body of fresh water yet reported. A 2011 study found its visibility ranged from 70 to 80 metres (230 to 260 ft), clearer than the 63 metres (207 ft) measured for Te Waikoropupu Springs, a previous record holder. For comparison, laboratory measurements show distilled water has a visibility of approximately 80 metres (260 ft). Scientists attribute the lake water’s clarity to its passage underground from Lake Constance, which filters out nearly all the particles suspended in the water. Its clarity reveals water’s natural blue-violet colour.
Lake Matheson, near the Fox Glacier in South Westland, New Zealand, is famous for its reflected views of Aoraki/Mount Cook and Mount Tasman. A traditional mahinga kai (food gathering place) for Māori people, the lake contains long finned eel as well as being home to many water birds. Lake Matheson was formed by glaciation ca. 14,000 years ago.click on image to enlarge
Photo by Ann-Marie Westwood
Loch is the Irish and Scottish Gaelic word for a lake and a sea inlet.
Villetta Barrea, province of L’Aquila, Abruzzo, ItalyThere is a document from the year 996 in which the ancient name of Barrea, Vallis Regia, first appears. This document also mentions that Barrea was given to the Duke of Spoleto during the dark feudal times in Italy, a period noted for its anarchic regimes and barbaric raids.
Crater Lake, Oregon, USA, is famous for its deep blue color and water clarity.
Crater Lake, also known as the “Gem of the Cascades,” is the deepest lake in the U.S. Surrounded by 2,000-foot cliffs, this pristine sapphire lake is disrupted only by the peak known as Wizard Island, which sits nearly in the center of Crater Lake. The lake partly fills a nearly 2,148-foot (655 m)-deep caldera (volcanic feature usually formed by the collapse of land following a volcanic eruption) that was formed around 7,700 years ago