The San Diego & Arizona Railway has been called "the impossible railroad". They broke ground in 1907 and completed the line in 1919. Between San Diego and Arizona is some of the most treacherous countryside in the U.S. with a bevy of workman and a lot of dynamite they managed to snake their way to Arizona. The railroad had many tunnels collapse over the years, especially in the Carrizo Gorge. The railroad decided to build the Goat Canyon Trestle in 1932 after a series of tunnel closures. The Goat Canyon Trestle is one of the most impressive feats of engineering in the world. Huell, Luis and a handful of ex-railroad employees hop on a 1932 Model A railbus and work their way to the now unused trestle. The Goat Canyon Trestle is the highest existing curved wooden trestle in the U.S. Huell takes a close look at this marvel from the top to the bottom. Men who worked on the line reminisce about the trestle and the wonder of its size and beauty.