If you’re looking for a way to squander the next couple hours or so of late Friday productivity, I have an idea for you. Head over to the University of Oklahoma’s Institute for Quality Communities’ blog where they have put together a tool to help visualize 60 years of urban decay in Texas and Oklahoma. An interactive image slider graphic, not unlike the one we use in our “Ghosts of Dallas” series, allows you to toggle back and forth between aerial photographs taken 60 or so years apart of the city centers of Houston, Fort Worth, Dallas, Austin, San Antonio, Tulsa, and Oklahoma City. You can see in an instant how an era driven by new highways, new parking codes and lots, new building styles like the skyscraper, housing projects, and public facilities like convention centers dramatically — and rather quickly — transformed the American urban landscape. It’s interesting, but a bit depressing — another reason to look forward to happy hour.