Many popular museums take visitors on a journey through the centuries or millennia. Industrial history, the history of development or cultural history all play a role in the museums. Sometimes the focus is on popular sports, sometimes on evolution or the transformation of a people. Hobby historians train to become prehistorians or specialists in the progress of a particular industry. In the living history rooms, guests can imagine themselves as Roman legionnaires, Neanderthals or top athletes. Excursions and guided tours guarantee amusing entertainment as well as a gain in knowledge.