The world's scariest bridges ? In pictures
http://www.theguardian.com/travel/gallery/2014/feb/06/the-worlds-scariest-bridges-in-pictures
http://www.theguardian.com/travel/gallery/2014/feb/06/the-worlds-scariest-bridges-in-pictures
A video is worth a billion words....That would be the Tacoma Narrows Bridge, or "Galloping Gertie".