Oberhausen (German pronunciation: [ˈoːbɐhaʊzən] ) is a city on the river Emscher in the Ruhr Area, Germany, located between Duisburg (c. 12 km) and Essen (c. 13 km). The city hosts the International Short Film Festival Oberhausen and its Gasometer Oberhausen is an anchor point of the European Route of Industrial Heritage. The city's Sea Life Centre was home to Paul the Octopus.Wikipedia
A place in Germany, Oberhausen is an interesting place to visit, given its unique culture, history and character. A gripping city on its own right, Aachen also deserves a visit. Add Aachen to your vacation plan, it has an interesting bunch of activities to do on your visit like Aachen Cathedral, Carolus Thermen Bad Aachen, Rathaus Aachen. Also, to reach Oberhausen, you'll have to take a flight to Aachen; so its not really a detour. And even if it is, the city is worth paying at least a quick visit. Popular vacation packages of Oberhausen are of 1-2 days.
Oberhausen is an affair to remember, follow this apt itinerary of the place and return home with a bunch of memories.