The tunnel curved to the left as if the cable was still there, though they could no longer be sure of it.

The tunnel continued for a hundred yards or so and then curved again.

The tunnel curved, then suddenly widened into a deep, round chamber.

The tunnel curved, and a dim light glowed at the end of it.

There was no easy way to tell if the tunnel curved from within it.

The tunnel behind them curved slightly to the left.

As he ran, Richard noticed that the tunnel was curving slightly to the right.

The tunnel curved to the right and then intersected with another.

She stopped suddenly as the tunnel curved into a small, empty chamber.

Then there was high gravity as car and tunnel curved back to horizontal.