The Broich castle is located in the same district Broich the city of Mülheim an der Ruhr on the west bank of the Ruhr near the city center. The fortification is located on the historic Ruhr ford of the old Hellweg and is in parts the oldest surviving early medieval fortification of the late Carolingian period north of the Alps.
As an industrial monument the Ringlokschuppen illustrates the structural change of the Ruhr region. The around 1900 engine shed comprised 24 circle segments for the subordination of locomotives in a total angle of 154 degrees with a building depth of 22.25 m. The outer radius is 57.75 m, the inner circle 35.50 m, the ridge surface 8.30 m and the eaves height 6.23 m. The roundhouse in Mülheim an der Ruhr is today a place for advanced cultural projects of the independent scene - theater, music, dance, performance, reading - and venue of the major festivals in the Ruhr, the RuhrTriennale, the Mülheimer pieces and the impulses.
Originally built in 1904, the 25.5m high water tower initially served the Reichsbahnausbesserungswerk Speldorf to supply the steam locomotives, which were located in the neighboring Ringlokschuppen. In 1992, the largest walk-in camera obscura in the world was installed in the now-listed building in the former water dome. The projection surface in the dome of the Mülheim Camera Obscura offers a complete panoramic view of the garden grounds of the MüGa to the horizon.
The Alte Dreherei is a three-aisled hall of the railway repair shop Speldorf in Mülheim an der Ruhr. Built in 1874, the industrial building with a floor area of more than 2,000 square meters has a unique wooden roof construction in Germany. As an architectural monument of industrial culture, it has been a listed building since 1991. In 2008, a long-term conservation organization was founded to supply the building for future use as the "House of Associations".