Brutalist building, Chicago cityscape, urban landscape, rugged concrete texture, geometric shapes, fortress-like structure, angular lines, imposing presence, cloudy sky, dramatic lighting, low-angle shot, strong shadows, brutalist aesthetic, industrial materials, rough stone walls, metal beams, functional minimalism, modernist influence, Willis Tower, Marina City, 1960s architecture, urban decay, graffiti-covered walls, worn-out pavements, American Midwest atmosphere.