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The route follows the tracks of the world's first long-distance journey by automobile in the year 1888, performed by Bertha Benz, the wife of Dr Karl Benz, the inventor of the automobile. It starts and ends in Mannheim.
Once abandoned and now restored by enthusiasts, this metre-gauge railway operates steam trains and diesel motor cars through rustic areas. It operates on the first Sunday of each month from May to October, plus on other scheduled event days.