Its main features are the scenic lake, lava caves and huge koala population.

It also has lava caves, near the track up to the summit, that are very accessible to visitors.

A walk up to the scoria summit passes lava caves.

Grjótagjá is a small lava cave near lake Mývatn with a thermal spring inside.

The nearby lava cave of Stóragjá is being used as an alternative bathing site.

But before the war Lugard did find some odd remains in one of the old lava caves.

As he had earlier explained, and we knew, the lava caves were tubes that one could enter only through the collapse of some roof section.

Though our travels through the lava caves had been good practice in underground oddities, the light showed us something new.

In some cases, they may mark skylights/entrances to subsurface lava caves.

There are many types of lava caves, with these being the most notable: