When we see them overtaken by nature, it's like one of those 'we live in a society' moments. It holds a lot of power, to see things we associate with technological modernity, recaptured by nature. We were once a great democratic society, we had the New Deal - the monuments from that era are now covered in vines, much in the way the Greek and Roman temples were weathered down to mere archeological artifacts. We are witnessing the decay of midcentury life and the manufacturing society. It confirms that we totally live in the post-industrial world.