I've meant to post this for a while. Here's a photo looking south-west from a point just southwest of the intersection of Wacker and Michigan, here in Chicago, in April 1986:
And here's a similar view today. Note that you can no longer see the Thompson Center, City Hall, or anything else beyond the row of skyscrapers erected on Wacker between Wabash and Clark since then:
The photos aren't from the same vantage point, because this afternoon I only had my phone and not my SLR. I will try to get a photo from approximately the same location and using the same focal length (probably 210mm) soon.