A large glacial lagoon named Jokulsarlon is placed in southeast Iceland, on the borders of Vatnajökull National Park, and is one of the most famous tourist attractions in Iceland.
The lagoon is the lowest point in Iceland with land at 200 metres below sea level. As the icebergs break away from the tongue of the glacier, they drift slowly to the mouth of the lagoon and eventually join the ocean. In summer, they melt and roll down the channel into the sea. In winter the lagoon freezes and locks the icebergs in place.