Describir: Bridges and how they are built /

  _____     _____     _  __     ___      ______    ______    _  _     _____   
 / ____||  |  ___||  | |/ //   / _ \\   /_   _//  /_   _//  | \| ||  |  ___|| 
/ //---`'  | ||__    | ' //   | / \ ||    | ||     -| ||-   |  ' ||  | ||__   
\ \\___    | ||__    | . \\   | \_/ ||   _| ||     _| ||_   | .  ||  | ||__   
 \_____||  |_____||  |_|\_\\   \___//   /__//     /_____//  |_|\_||  |_____|| 
  `----`   `-----`   `-` --`   `---`    `--`      `-----`   `-` -`   `-----`