There's a small underground pool of clear water in the next chamberq-we have food and wood for the fire.

The boat slipped and slid across the mirror-surface of the underground pool.

Oh, you are wondering how I expect to reach an underground pool by flying through the air?

The original underground pool was also covered by a false floor to house the men's section of the store.

The steps ended in an underground pool of dank, deep water.

A magma chamber is a large underground pool of liquid rock found beneath the surface of the Earth.

But there was no telling what kind of chemical contaminants had settled into the brew of this underground pool.

The catacombs also included an underground pool for canal boats.

The ones who lived in those underground pools?

She led him through the tunnel to the underground pool connecting with Lake Michigan.