Jökulsárlón is one of Iceland’s best known natural wonders. It is a big glacial lagoon touched by Vatnajökull glacier with huge icebergs floating around while the surrounding landscape is dominated by black sand and rocks. Flood and ebb affect the lagoon which is a mix of sea and fresh water, carrying nutritious foodstuff, coveted by seals and eider ducks, into the lagoon. The Jökulsárlón lagoon is situated on Breiðamerkursandur, between the Vatnajökull National Park and Höfn in Hornafjörður. The lagoon formed when Jökulsá river ran straight down from underneath the great glacier, approx. one and a half km to the sea. Since 1950 the glacier has pulled back steadily, forming an ever-growing lagoon.