This excellent eBay seller promptly mailed this photo on a postcard for the Garabit Railroad Viaduct over the Truyère River in the Massif Central mountainous area of central France. This arching bridge was designed by Gustave Eiffel about five years before the famous Tower he designed. I saw this long, arching bridge as I drove south from the Saint Flour area of France (without knowing what it was at the time); I was just impressed by its size & presence. I have sense learned what I saw! Thanks!