Jökulsárlón Glacier Lagoon
Thousand-year-old icebergs calve from Breiðamerkurjökull outlet glacier and drift through Iceland's deepest lake toward the Atlantic Ocean. The lagoon has quadrupled in size since the 1970s as the glacier retreats.
Boat tours among the icebergs operate from May to October, offering close encounters with the crystal-blue ice formations and the seals that rest on them.