What alarmed him was that this mysterious structure was moving steadily closer.

It is a mysterious abandoned black structure similar to the Alhambra.

At the complex, a mysterious structure resembling a space dock was being constructed.

I could see the pressurehead, several tunnels including the one we had emerged from, the mysterious inner structure of the floor.

All day, two mysterious structures had been taking shape beyond the ranch corral.

Some experts predict that, at the Millennium, a computer domino effect will set in, like a power outage, bringing down the whole mysterious structure.

They find a mysterious structure deep in the woods - a deserted castle that at night becomes a bathhouse for the gods.

There could be no doubt about the direction of the tracks: they led straight to the mysterious structure.

As various calamities continue to befall each character, part of the group ventures out to find the mysterious structure.

Like several others who walked by the mysterious structure, she questioned whether it was a functioning chimney.