Jökulsárlón (e. Jokulsarlon meaning “glacial river lagoon”) is a large glacial lagoon in southeast Iceland, on the edge of Vatnajokull National Park. Situated at the head of the Breiðamerkurjökull (Breidarmerkurjokull ) glacier, it developed into a lake after the glacier started receding from the edge of the Atlantic Ocean. The lake has grown since then at varying rates because of melting of the glaciers. It is now approximately 1 kilometer away from the ocean’s edge.
It is considered to be the deepest lake in Iceland, at over 248 meters deep. It is considered as one of the natural wonders of Iceland.
The lake is about 4,5 hours drive from Reykajvik, non stop. It is known for the ghostly procession of luminous blue icebergs and has been a setting for four Hollywood movies: A View to a Kill, Die Another Day, Lara Croft: Tomb Raider and Batman Begins, as well as the “reality TV” series Amazing Race.
The Jokulsarlon lake provides outstanding views of the ice cap, a vast dome of ice and the lagoon. Vatnajokull was at the shore line of the ocean and dropped icebergs into the ocean. However, it started drifting in land rapidly every year leaving deep gorges en route, which got filled with melted water and large chunks of ice. These icebergs gather at the mouth of the lake’s shallow exit, melt down into smaller ice blocks and roll out into the sea. In summer, icebergs melt and roll down the channel into the sea. In winter the lake freezes and locks the icebergs in place. Ice water and soil make a unique ecological phenomenon. Jokulsarlon lake, the “glacier lake”, is now estimated to have doubled in size in the last 20 years. The huge blocks of ice that calve from the edge of Vatnajökull are about 30 meters (98 ft) high which fills the lagoon stocked with icebergs. Some icebergs appear naturally sculpted on account volcanic ashes from ancient eruptions that partly cover them.