Ice caves
In Iceland, the most impressive caves are ice caves. It is famous for its intense, electrifying blue color, but remember that not all of them are.
They naturally form in the summer when melt water carves long tunnels under thick layers of ice.
Because they are natural caves that melt and decay every summer, they also appear in different places every year, they are of different sizes and shapes. In one year, you can discover a few available caves, and in another - none.
Ice caves change size and shape every day, so each visit is unique.