Describir: Bridges and how they are built /

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