It isn’t always what you are looking at that is appealing. Sometimes, it is just the shape that attracts your attention. In the area around Midway Airport are a number of rail yards. The way in which they fan out from the entry tracks and then close down again at the other end makes for an interesting shape which can only be appreciated from the air. Here is an example of what I mean. It really doesn’t matter what is in the yard. The form is all that I am looking at.