Across
- 1. Top of a mountain or hill
- 5. Major Southeast Asian river
- 6. Ridge from glacial streams
- 13. Large US river
- 15. Flat rock edge
- 16. River flowing through London
- 17. Sacred Indian river
- 20. Longest river in France
- 22. Sudden ground movement
- 24. Coastal lowland area
- 26. Neighboring Mesopotamian river
- 28. Safe shelter for boats
- 30. Europe's second-longest river
Down
- 2. Deep oceanic valleys
- 3. Longest river in Asia
- 4. South America's great river
- 7. Natural water sources
- 8. River in Mesopotamia
- 9. Small rounded hill
- 10. Elevated rugged terrain
- 11. Longest global river
- 12. Coastal swamp trees
- 14. Famous Parisian river
- 18. Longest European river
- 19. Steep cliff near water
- 21. River flowing into North Sea
- 23. Land reclaimed from water
- 25. Underground water storage
- 27. Land between mountains
- 29. Sand hill created by wind