Salviago, besides himself with worry for Carlotta, leads everyone to the underground grotto.

They came to an alcove rimmed with a low stone railing that overlooked an underground grotto.

Cliff realized that it would take formidable force to smash through to The Condor's underground grotto.

I could not but marvel at the immensity of this great underground grotto.

Smaller than she had thought, it was as dim as an underground grotto, and just as empty.

The grounds are particularly striking, from the glorious moat to the gardens and a maze with an underground grotto.

He saw the farside of the underground grotto, where several badly damaged buildings crumbled into rubble.

A darkness blacker than imaginable night settled on the underground grotto.

It was like some underground grotto or an ant's orchard.

An artificial waterfall plunges from the top of the belvedere through an underground grotto down the lake.