aon center
apartment
architecture
building exterior
built structure
chicago
chicago loop
city
city life
cityscape
color image
cook county illinois
day
downtown district
famous place
home ownership
horizontal
idyllic
illinois
lake
lake michigan
landscape
midwest usa
modern
monroe harbor
natural landmark
no people
north america
outdoors
skyscraper
summer
sunlight
sunny
tourism
tower
travel destinations
urban skyline
usa
waterfront