It has a massive tower of square section, with three levels.
At one point, they came upon a square section of concrete surrounding a steel door in the tunnel wall.
The square section of floor began to lower itself.
It turned out to be a square section paved with linoleum.
The arena is divided into 12 square sections called zones.
The big hatch was still open, a great square section folded out.
He pointed to a high, square section of the looming mountains.
A square section of the floor had hinged downward under his weight.
Suddenly, a square section of what had been a solid wall opposite the command chair began to glow.
A square section of the floor gave way under the weight of the dangling rock.
