The Glacier lagoon in Iceland is close to highway number one, about 370 km (230 miles) east from Reykjavík and it is told to be one of the greatest wonders of nature in Iceland. This lagoon is a recent one, the result of a warming climate. The surface is at sea level and sea water flows into the lagoon at high tide.
Huge blocks of ice constantly break off the glacier, Breiðamerkurjökull, and large icebergs float on the lagoon. The lagoon is not very wide but it is up to 250 meters deep which makes it the deepest lake in Iceland. Breiðamerkurjökull is an outlet of the Vatnajökull glacier.