Sparks says that they should not drill, that could cause the entire cavern to collapse.

Below it, a pool took up the entire cavern, except for the walkway around it, perhaps five paces wide.

Suddenly, the entire cavern was illuminated by bright fluorescent lights set into the rock walls.

The massive form blocked our view of the entire cavern.

From this new vantage point he could see the entire cavern.

It wouldn't take two months to form the entire cavern, with our unlimited power.

She managed somehow to keep track of what was going on in the entire cavern without losing sight of her son.

The entire caverns became open to his comprehension, without physical travel on his part.

The blaze of its burning wings lit up the entire cavern.

Heat patterns from various fissures and hot springs swirled about the entire cavern.