Related Clues:
- City NE of Düsseldorf
- Krupp works site
- Krupp works city
- German city
- River to the Rhine
- Have breakfast, e.g., in Germany
- Big Bertha's birthplace
- Museum Folkwang locale
- German electricity-producing city
- German industrial locale
- Germany's ___ Valley
- City in the Ruhr
- Ruhr industrial center
- Where Big Bertha was built
- Essen basin