| Answer | Crossword Clue |
|---|---|
| TORNE | Swedish river forming boundary with Finland. |
| EMS | River forming part of the Germany-Netherlands boundary |
| EIDER | River and canal forming boundary between Schleswig and Holstein. |
| URAL | River forming part of the boundary between Europe and Asia |
| MINO | River forming part of the boundary between Spain and Portugal: Span. |
