Vatnshellir

Vatnshellir is a lava cave located in the Purkhólahraun lava field, which is considered one of the most cave-rich lava fields in Iceland. The lava is basaltic pahoehoe and is estimated to be between 5,000 and 8,000 years old.

Vatnshellir is part of a larger cave system consisting of four caves. The uppermost cave is the main Vatnshellir and is accessible to the public. Below it lie the sections known as Bárðarstofa and Vættagangur, and at the lowest level is the cave called Iður. Together, the lower sections are known as the Undirheimar, or “the Underworld.”

The total length of the lower cave system is approximately 200 meters, with ceiling heights reaching up to 10 meters in many places. The deepest section, Iður, lies more than 30 meters below the ground surface. In the ceiling of the cave, especially in Vættagangur, a whitish, shimmering bacterial or fungal growth can be seen, reflecting light and creating a unique atmosphere.

The cave takes its name from its former use as a water source. In the past, water was collected from the cave, and cattle from the Malarrif area were watered there during dry periods.

Vatnshellir is located on the southern slopes of the Purkhólahraun lava field, above Malarrif and close to the Útnes road. A parking area is located near the main road, and the cave is a popular destination for visitors interested in lava caves and the geology of the Snæfellsnes Peninsula.

Photo: Anton Stefánsson