Abandoned Underground Freight Railway (Chicago) - Inventive: The constant underground air temperature of led to a second line of business air conditioning. Several theaters bought tunnel air to keep audiences cool
Chicago Art Institute, 1904 My husband and I find it amazing how "barren" the Chicago landscape was in these early days! And fun to see the lions there. Look in the comments below to see the Art Institute as it was last summer when we were in the city.