graphic, architectural abstraction with huge industrial buildings and complex, engineering structures. gloomy, gray city

industrial building factory future city construction gloomy engineering factories structure transitions hill front dust smog debris antenna skyscraper sky ecology nature landscape environment cityscape architecture industry urban scifi science fiction technology dark futuristic cyber world town scape skyline street bridge tower silhouette monochrome grey white black background abstraction illustration graphic architectural huge buildings complex structures gray skyscrapers bridges art structures