Editing Wall (section)

==Border wall==
{{Main|Border barrier}}
[[File:Berliner Mauer, ostdeutscher Grenzer beobachtet Räumung des Kubat-Dreieck.jpg|thumb|Berlin wall, July 1, 1988]]
[[File:Algodones sand-dune-fence.jpg|thumb|[[Mexico–United States barrier]] in California]]
Some walls formally mark the border between one population and another. A [[border wall]] is constructed to limit the movement of people across a certain line or [[border]]. These structures vary in placement with regard to international borders and [[topography]]. The most famous example of border barrier in history is probably the [[Great Wall of China]], a series of walls that separated the Empire of [[China]] from nomadic powers to the north. The most prominent recent example is the [[Berlin Wall]], which surrounded the [[enclave]] of [[West Berlin]] and separated it from [[East Germany]] for most of the [[Cold War]] era. The US-Mexico border wall, separating the United States and Mexico, is another recent example.