How to use "underground" in a sentence

A few minutes later, he found himself in a long underground passage, a place of absolute peace and silence

But it was crowded because Cham had two younger sisters, and Sala knew they all hated living deep underground - especially Cham's dad Tian.

The Nevada Nuclear Test Site, where underground detonations were conducted several times a year, was less than a hundred miles north of Las Vegas

"I dream he's alive, trapped somewhere, usually in a deep pit or a gorge or a well, someplace underground

It could be an underground break on your property

Dombey's concern for the kid was greater than his fear of being trapped underground and buried alive, and finally his attack of claustrophobia diminished

Danny called to her again and again, begging her to save him before the roof of his underground prison caved in and buried him alive

In the rectangular room, three stories underground, computers hummed and murmured.

Their lines are underground

The first floor was at the bottom of the structure, the deepest underground.

'You see, I intend to live underground

And then there are the railways, where they go underground

We must make great safe places deep underground, and get all the books we can; not novels and poetry, but ideas, science books