A good view of such a lava tube is shown below.

Or else this was one hell of a lava tube.

They set up a camp back out of the weather in an old lava tube.

The cave is an excellent example of a lava tube.

You can peer into a lava tube with its own ecosystem.

The major caves of the Horse system are lava tubes.

They emerged from the lava tube, into a dazzling morning.

His body might be hidden in some crevice or lava tube.

And the brave can explore some of the more challenging lava tubes.

It is also the largest lava tube in Jeju island.

The underground storage and lava tubes were an obvious target.

It consists of a complex lava tube with several entrances.

Manjanggul is one of the longest lava tubes in the world.

Sometimes the lava tube remains intact for a time.

This forms an underground channel that becomes a lava tube.

Several caves and lava tubes can also be found at Byaduk.

An easily accessible lava tube was named for the Thurston family.

For several minutes, she was literally crawling on her belly through yet another ancient lava tube.

Ignoring David's small sigh of relief, he investigated the new lava tube.

A lava tube is actually as scary as it sounds.

Another species is found only in lava tubes on the Island of Hawaii.

This cricket spends its entire life on the ceiling of lava tubes.

Lava tubes provide ideal positions for shelter because of their access to nearby resources.

Surtshellir - For a long time, this was the longest known lava tube in the world.

The natural lava tube that provided an underground entrance and exit into the mountain behind, he already knew.