Gotthardbahn: Piantorino Viaduct (Im Bau) by Adolphe Braun and Cie https://www.rawpixel.com/image/14315740/gotthardbahn-piantorino-viaduct-im-bau-adolphe-braun-and-cieFree Image from public domain licenseGotthardbahn: Kerstellenbachbrücke (Im Bau) by Adolphe Braun and Cie https://www.rawpixel.com/image/14314816/gotthardbahn-kerstellenbachbrucke-im-bau-adolphe-braun-and-cieFree Image from public domain licenseGotthardbahn: Kerstellenbachbrücke (Im Bau) by Adolphe Braun and Cie https://www.rawpixel.com/image/14314583/gotthardbahn-kerstellenbachbrucke-im-bau-adolphe-braun-and-cieFree Image from public domain licenseGotthardbahn: Amsteg mit Kerstellenbach Viaduct (Im Bau) by Adolphe Braun and Cie https://www.rawpixel.com/image/14315942/image-people-water-mountainFree Image from public domain license