They were more or less confined to their city, their motive power being electricity conducted via metal walkways.

In the center they came to a ready-made metal walkway, and continued along it without having to step over ribs and gussets every few feet.

Beyond the door a metal walkway ran on.

To your left is a metal walkway with railings.

Reaching the foot of the stairs, he moved out a few steps on a metal walkway and Mary came to stand beside him.

His boots resounded against the metal walkway as he walked farther down the corridor.

A metal walkway and two towers were also built as vantage points for the guards.

Marcus could hear some shouting far away and close boots clanking on the metal walkway.

A metal walkway led up to a platform and rectangular window.

After a drive of twenty minutes, the disoriented Russians were led across a metal walkway and into an elevator.