Chicago Board of Trade Building, Downtown Chicago, Illinois, United States of America, North America

travel destination travel destinations travel photography colour image colour color image color vertical chicago board of trade building downtown chicago illinois usa us united states usa us united states united states of america north america american north american outdoors outside low angle view low angle from below looking up building building exterior architecture architectural architectural skyscrapers city us flag patriotism day urban scene national landmark landmarks clock no people nobody no one no one 20th century finance business