Something moved in the back of the subterranean chamber and then someone approached.

But then something on the far side of the subterranean chamber caught his eye.

The young man explained that there were many subterranean chambers like this room throughout the city.

When he reached the bottom, he found himself in a tight subterranean chamber.

Its iron ring proved it to be the entrance to some subterranean chamber.

We were thrust down this narrow way and eventually came out into a big subterranean chamber.

He had to get back to his subterranean chamber and await a better one.

These are artificial subterranean chambers that were probably used to store water.

Once again, the cool, moist air of the subterranean chamber surrounded them.

At first, I thought the pattern might symbolize a subterranean chamber.