Describir: Bridges and how they are built /

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