Jökulsárlón is a glacial lagoon, bordering Vatnajökull National Park in southeastern Iceland. Its still, blue waters are dotted with icebergs from the surrounding Breiðamerkurjökull Glacier, part of larger Vatnajökull Glacier. The Glacier Lagoon flows through a short waterway into the Atlantic Ocean, leaving chunks of ice on a black sand beach. In winter, the fish-filled lagoon hosts hundreds of seals.