Describir: The geography of frontiers and boundaries

 _    _      ___     _____       ___      ______   __   __    _____   
| |  | ||   / _ \\  |  __ \\    / _ \\   /_   _//  \ \\/ //  |__  //  
| |/\| ||  / //\ \\ | |  \ ||  / //\ \\  `-| |,-    \ ` //     / //   
|  /\  || |  ___  ||| |__/ || |  ___  ||   | ||      | ||     / //__  
|_// \_|| |_||  |_|||_____//  |_||  |_||   |_||      |_||    /_____|| 
`-`   `-` `-`   `-`  -----`   `-`   `-`    `-`'      `-`'    `-----`  
                                                                      
   ___    
  / _ \\  
 | / \ || 
 | \_/ || 
  \___//  
  `---`