Related Clues:
- River straddled by Basel, Switzerland
- River that flows past more than 40 castles
- Longest Swiss river (Var.)
- River past Solothurn
- Cologne is found on it
- Watery view from Basel
- Liechtenstein's western border
- Lorelei's locale
- River from the Alps to the North Sea
- Swiss river with a famous gorge
- Hellman's "Watch on the ---"
- Eau de Cologne?
- German river whose valley is known for wine
- Great river with Lorelei Rock
- Great German river