Ice caves are temporary structures that appear at the edge of glaciers.
They look amazingly beautiful from the inside.
This particular cave is located on the frozen lagoon of the Svinafellsjokull glacier in Skaftafell, Iceland.
However, this blue ice can be seen only under certain circumstances.
It can be seen in ice-caves like this one and onfloating icebergsthat have recently rolled over.
The cave is accessible through a 22-foot entrance on the shoreline.
At the end it tapers to a tight squeeze no more than four feet high.
Ice caves are in general unstable things and can collapse at any time.
They are safe to enter only in winter when the cold temperatures harden the ice.
Even so one could hear constant cracking sounds inside the cave.
Each time the glacier moved a millimeter loud sounds could be heard.
These beautiful pictures were taken by 35-year old photographerOrvar Thorgeirsson.
