In the center of the arena was a circular pit about fifty feet across.

In the floor of the room was a circular pit.

And then they came to a circular pit, geometrically perfect.

In the center of the chamber was a circular pit, ten meters across.

The sides of the roughly circular pit showed rock that had been cut away.

One moment there was nothing - the next, a circular pit awaited them.

Ahead of her loomed a very wide, circular pit lined with shaped stone.

The fire was contained in circular pits, each tended by one of the maidens.

He had dug a roughly circular pit in the ice.

A circular pit took up most of the floor, and the glow was coming from there.