Jökulsárlón, which literally means “glacial-river-lagoon”, is located on the edge of Vatnajökull National Park. Situated at the head of the Breiðamerkurjökull glacier, an outlet of the Vatnajökull glacier, it developed into a lake after the glacier started receding from the edge of the Atlantic Ocean.
A recent natural phenomenon and a result of the warming climate, the surface of the glacier is at sea level and the sea water flows into the lagoon at high tide where the mix of salt and freshwater gives a vibrant blue-green colour. Huge blocks of ice constantly break off the glacier and large icebergs float on the lagoon.
Whilst relatively narrow, in some places the lagoon is up to 250 metres deep which makes it the deepest lake in Iceland. Featured in numerous blockbuster films the lagoon can be seen from the road between Höfn and Skaftafell, appearing as a ghostly procession of luminous blue icebergs.