Icebergs floating along the southern Pacific coast of Chile often appear blue. This is an optical illusion caused by the ice crystals scattering the sunlight. When a chunk breaks off the nine-mile San Rafael Glacier, it sounds like dynamite followed by an enormous wave. Then, the 300,000 year-old sculptures travel gracefully until melted by the sea. Unfortunately, the two million acre ice field called Campo De Hielo Norte is retreating by over 600 feet a year.
