What's the first thing that comes to mind when you think of a border? It may be the infamous border wall in the United States, the barbed wire fencing used in several European countries, or simple border posts with armed guards - all used to keep migrants out. The vast majority of the world's borders are actually relatively nondescript, often even beautiful. That's what photographer Valerio Vincenzo reveals in his photography book borderline. He joined Erin Ogunkeye on Perspective.