I attended college in South Chicago while in my early 20s. Chicago was a fun place for a young, irresponsible kid to explore and enjoy. I took full advantage of this truth, taking the train to the city at every opportunity. In my often aimless wanderings, I often lost track of where I was and found myself lost. This was a problem until I learned a simple trick for navigating the sprawling streets of the Chicagoland area. In the middle of the downtown area, there was a landmark that was easily visible for miles around: The Sears Tower (though they’ve since changed the name). The tower is one of...