Kleifarvatn is the largest lake on the Reykjanes Peninsula in Iceland , situated in the southern part of the peninsula . It is located on the fissure zone of the Mid-Atlantic Ridge . The lake has no visible water coming in or going out as most of its water comes and leaves underground . The lake can be reached via a track , and there are two areas with high temperature that can be found not far from it : Seltún/Krýsuvík and another to the east . The lake 's greatest depth is 97 m . After the 2000 Iceland earthquakes , the lake began to diminish , and 20 % of its surface has since disappeared
2000 Iceland earthquakes
2000 Iceland earthquakes
Kleifarvatn