网页The Aalen–Ulm railway, also called the Brenzbahn (Brenz Railway}) or the Brenztalbahn (Brenz Valley Railway), is a single-tracked, non-electrified main line from Aalen to Ulm in southern Germany. It is 72.5 km (45.0 mi) long and, for 27 km (16.8 mi), follows the Brenz River that gives it its name.