When after the collapse of East Germany and reunification many chemical plants were closed down, the museum recovered their most notable equipment and apparatuses (some 5,000 objects in total). The biggest of which are displayed in an open-air "technology park" outside the museum. Among the most outstanding exhibits are a complete ammonia synthesis chamber from the earliest years of the Haber–Bosch process (named for its Nobel Prize-winning inventors) with a corresponding circulation pump, and a chemicals train.