At the Ruhr

The Freilichtbühne Mülheim an der Ruhr (Mülheim an der Ruhr Open-Air Theatre) is an open-air amphitheatre in North Rhine-Westphalia, Germany, built in 1936 as a Nazi Thingplatz. It is the most important open-air theatre in the Rhine-Ruhr region and with 20,000 seats, one of the largest in Germany.

The 2007 German Open Grand Prix was the first grand prix tournament of the 2007 BWF Grand Prix Gold and Grand Prix. The tournament was held in RWE-Sporthalle, Mulheim an der Ruhr, Germany from February 27 until March 4, 2007 and had a total purse of $80,000.

Rumbach (also: Ruhmbach) is a river of North Rhine-Westphalia, Germany. It is a right tributary of the Ruhr in Mülheim.