Breiðamerkurjökull

thumb|right|300px|The Breiðamerkurjökull Glacier field Breiðamerkurjökull (, ) is an outlet glacier of the larger glacier of Vatnajökull and a piedmont glacier in the southern part of Vatnajökull National Park, Iceland. Emerging as a tongue of the Vatnajökull, it ends in two lagoons, famous Jökulsárlón and smaller and less known Breiðárlón. Over time, it has gradually been breaking down.

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. They are stated to float in the deep lagoon for 5 years, which is around deep and spreads over an area of . It was near the ring road until 35 years ago before retreating rapidly and forming the Jökulsárlón lagoon. The high Breiðamerkurfjall mountain was enclosed by the Breiðamerkurjökull and Fjallsjökull before the drifting started and formed the Breiðárlón lagoon, which is not as dramatic as the Jökulsárlón lagoon.