Ellenroad Engine House preserves a massive steam mill engine, a reminder of the power that drove the textile towns around Rochdale. The machinery is the point: huge wheels, polished metal and the physical scale of Victorian and Edwardian industry made visible in one building.
It is a specialist attraction, but a good one if you care about industrial history. Try to visit on a steaming day if possible, when the engine house comes alive and the difference between static heritage and working machinery becomes obvious. It pairs naturally with Rochdale's co-operative and textile history.