CTA train on the Loop track which runs above ground in downtown Chicago, Illinois, United States of America, North America

travel destination photography horizontal colour image building exterior architecture skyscraper day outdoors urban scene downtown chicago illinois united states of america north america chicago 'l elevated train transportation large group of people side view head and shoulders built structure train on the move public transportation low angle view city city life american culture usa us united states american north american colour color image color outside tourist destination travel architectural low angle from below looking up group transport cities typically american traditional culture tradition traditional traditionally american