Buildings in downtown Chicago with a water reservoir on the rooftop of a residential building, showing the contrast of old and new buildings, Chicago, Illinois, United States of America

outdoors day daytime urban business office building modern history contrast glass buildings contrasting roof facade historic brick apartment tank condominium condo residential rooftop condos apartments real estate residence offices tanks condominiums reservoir architectural exteriors reservoirs office buildings office building chicago contrasted historical window blue sky outside windows nobody travel colourful color image water architectural detail no one no people building exteriors commercial building commercial buildings water tank water reservoir