This is an image from the Jökulsárlón on the south western coast of Iceland. According to my guide book the lagoon formed as the Breiđamerkurjökull, a branch of the Vatanjökull complex, retreated during the decades following 1920. The size of the lagoon has increased fourfold over the past 40 year, and since 1930 the glacier front has retreated more than 1,5km from the seafront and the lagoon now covers an area of almost 20 square kilometers.