Downtown Chicago has a rich and constantly evolving architectural landscape. There are even architectural walking and boat tours. After the success of 'The Devil in the White City,' a New York Times bestseller, there was even a walking tour created in response to interest in the locations in the book.
It's really easy to neglect taking photos of the things you see on a daily basis. I'm about 1000x more motivated to take photos when traveling than when traversing the area I live in. So, it only seems to make sense that I get more photos of Chicago after having moved away than when I was living there.
View of the Chicago River from the 23rd floor of the Holiday Inn Chicago-Mart Plaza.