cavern

According to the article’s authors, the US Geological Survey should be charged with scanning the country for underground caverns where large amounts of hydrogen could be stored.

It’s easy to become disoriented exploring the game’s numerous underwater caverns.

As these rocks dissolved, caves and caverns were carved out over an enormous length of time — measured not by the tick-tock of clocks but by the drip-drip of water — forming the Shenandoah Valley caverns we visit today.

Professional caving means entering a world more dangerous than any well-trod tourist cavern.

The presence of charcoal suggested fire, and the presence of fire deep in an icy cavern suggested human activity.

The Beatles Story Museum features a replica of the Cavern Club and a Fab 4D animated cinema show.

Next door to the museum is a clone of the Cavern Club, the Beatle Café and the Sala John Lennon stand-up comedy theatre.

Her body was covered with a blanket when it was found inside a cavern of the ancient walls, obscuring it from view.

Mr. Cunningham's description of the drawings of the natives in a cavern on Clack's Island.

It was something which announced itself; a chill breath that seemed to issue from some vast cavern wherein discords waited.

I have written at least a dozen about this cavern, and I've described it without even forgetting a single sprig of moss.

But at some distance from the cavern he dropped his pipe, and on stooping to pick it up he picked up instead a little satin shoe.

Lake Luna was a-glare from the mainland to Cavern Island, and the freight boats had given over running until the spring break-up.