Chicago cityscape, Willis Tower, reflective glass windows, steel beams, Art Deco details, skyscrapers, urban landscape, sunny day, blue sky, fluffy white clouds, city streets, pedestrians walking, yellow cabs passing by, historic buildings, ornate facades, intricate stone carvings, grand entranceways, marble floors, wooden doors, architectural landmarks, guided tour group, tourists taking photos, audio guides, headphones, summer afternoon, warm light, deep depth of field.