He stared around him at the basalt walls.

The fortress's basalt walls were bristling with men and weapons hastily summoned in the middle of the night.

Castillo means castle in Spanish, and the steep basalt walls of the mountain indeed make it look like one.

Across from the white dome is a black basalt wall.

The black basalt walls to left and right, the lander bay behind him, were all quite motionless.

Four areas were excavated based on the ground survey and traces of a basalt wall.

A slight breeze had come up, brushing the basalt wall with tenuous fingers.

The black basalt triple walls, which encircle the old town, give the city a rather ominous appearance.

She viewed not only the exterior but also saw through the thick basalt walls.

It had a courtyard to its east that measured 53 x 37 feet and was enclosed by basalt walls.