That room, like Joe's cell, was a low underground cavern.

The lower caverns of the Hold were checked against possible seepage.

In one of the lower caverns he had come upon it, its huge canisters empty now.

Only a thin sheet of ice sealed the entrance to the lower caverns.

He came pounding into the lower cavern, straight up to Torene.

It took a moment for Simon's eyes to adjust to the more profound darkness inside the low cavern.

Why did you go to the lower caverns alone?

But when they set off next morning, they came after only two hours of walking to a low wide cavern into which green light filtered.

Killashandra asked as they made their way back to the lower cavern.

They stood in a low, wide cavern, the air sweet with the smell of the dry rock.