One of the more historic buildings in the Sloop, the Transportation Building at 600 S. Dearborn, has an interesting past. It also has been converted into a residential building and has some unique units.
This one caught our eye because of the built-in bookshelf. Maybe not the most important feature when looking for a home, but something nice nonetheless:
This building also tends to have nice views and this unit is no exception if you're a fan of the Willis Tower:
This specific unit is a 1bd/1bth and is listed for $235K (but doesn't appear to have parking included).
If you haven't been to the building, it's worth a gander. The open house is this Sunday, July 24th (11-1pm).