| Answer | Crossword Clue |
|---|---|
| CAIRO | City on the world's longest river |
| NILE | The world's longest river |
| NILEBASIN | Drainage area of the world's longest river |
| OSLO | The world's longest road tunnel now links this city with Bergen |
| TAGUS | Longest river on the Iberian Peninsula |
| BAKU | Largest city on the world's largest lake |
