Kleifarvatn is a special dive site in Iceland. With its 8 square meters in size and a maximum depth of 95 meters, it's the largest and one of the deepest lakes in Iceland. Kleifarvatn or Lake Kleifarvatn is located on the most volcanically active part of the Middle Atlantic Ridge which leads to some unusual features. For example, the lake contains rare volcanic craters that send up volcanic gas bubbles. This happens with so much pressure that the surrounding rocks slightly vibrate. You can feel these vibrations during your dive. Lake Kleifarvatn is also called the disappearing lake. A major earthquake in the year 2000 caused it to run dry after which it has risen back to its original level. Add to that the surrounding, volcanic landscape, full of steep hills and strange lava formations, and you can rightly speak of a unique dive site.