MWO Modellbahnwelt Oberhausen is a large H0 model railway installation showing the Ruhr area during its industrial peak in the late 1960s. It is a niche attraction, but the subject fits Oberhausen well: railways, factories, and dense industrial towns in miniature.
It works best for families, railway fans, or anyone using the CentrO and Gasometer area as a cluster of lighter sights. Do not expect a broad city museum; the pleasure is in the detail.