The World's Clearest Lake

http://news.yahoo.com/worlds-clearest-lake-yields-stunning-photos-140047235.html
http://www.niwa.co.nz/news/nelson%E2%80%99s-blue-lake-%E2%80%93-the-clearest-freshwater-ever-reported
http://www.amusingplanet.com/2013/06/blue-lake-nelson-new-zealand-clearest.html
http://www.livescience.com/37587-photos-clearest-lake-on-earth.html
http://www.2oceansvibe.com/2013/06/13/enjoy-the-first-ever-photos-of-the-worlds-clearest-lake-gallery/


Others
http://www.omg-facts.com/Science/Crater-Lake-Is-The-Clearest-Lake-In-The/26983

http://www.travelsupermarket.com/blog/crystal-clear-waters/