It is interesting to walk through the Loop area of Chicago with its lovely skyscrapers. If I remember correctly, it was in Chicago that the first skyscapers were built in the late 19th century. Sullivan then branched out into a new style of architecture called the Chicago School. Later developments in the construction of these buildings also came from Chicago. I think this is also the correct season to emphasize the role of Fazlur Khan in the structural engineering fundamentals of all modern skyscrapers: he worked in the Illinois Institute of Technology in Chicago.
I liked walking through the fog on Michigan Avenue. The best thing about fog in Chicago at this time of the year is that it keeps the city warm. On a night without fog the temperature dropped almost to 10 Celsius below zero. With the fog the temperature is a mild 2 degrees above. The second is that you get lovely photos of the city: from the view of Michigan Avenue above, to the riverside skyscrapers in the featured photo. Chicago is beautiful at this time.