Dystopia-Noun phrases

The bracing autumn wind slapped gently against the steel of the car, whistling slightly as it gradually approached the bridge. The grey uniforms of the guards beside the checkpoint flapped in the wind, almost giving him the impression of giant monotonous birds. The mist rolled over the bridge in slow moving tendrils, pulling themselves through the air and wrapping themselves around the looming structure of the power station, which watched over the surrounding city.