Map railroad transcontinental First railroad transcontinental First railroad transcontinental Building railroad transcontinental Railroad transcontinental Building railroad transcontinental Chinese railroad transcontinental First railroad transcontinental Map railroad transcontinental Map railroad transcontinental City railroad transcontinental City railroad transcontinental Chinese railroad transcontinental Central first pacific railroad transcontinental Central first pacific railroad transcontinental Building railroad transcontinental Map railroad transcontinental First railroad transcontinental Picture railroad transcontinental Building railroad transcontinental Building railroad transcontinental Picture railroad transcontinental Chinese railroad transcontinental Chinese railroad transcontinental Railroad terminus transcontinental western First railroad transcontinental Railroad terminus transcontinental western Central first pacific railroad transcontinental Completion railroad transcontinental First railroad transcontinental