It's, you know, a huge tunnel, an amazing amount of traffic going by, very unlikely that anyone is going to find it.

The lights were growing more frequent now as mile after mile of the huge tunnel moved back.

The huge tunnel, driving straight into the heart of a mountain, was impressive.

Doc held the flashlight high, pointing out the way along a huge tunnel.

One of them is about 26 feet high, with huge subterranean tunnels beneath it.

Perhaps this twisting huge tunnel was one of the bowels of the Earth.

As she maneuvered through the huge tunnels, she discovered a surprise.

The sinkhole was like a huge inverted tunnel, 70 feet across at the top and more than 150 deep.

If Rhodan's information was correct the huge tunnel was more than 2500 feet long.

They stepped into a huge natural tunnel that had been improved by human hands.