Across
- 2. City home to the Pyramids of Giza
- 5. Largest river by discharge volume
- 7. Capital of Spain
- 10. Desert spanning northern China and southern Mongolia
- 11. Cold, treeless region
- 13. Australian city with a famous opera house
- 15. Capital of South Korea
- 18. Capital of Kenya
- 19. Largest desert in Africa
- 21. River running through London
- 23. Mountain range in Europe
- 24. Desert in Southern Africa
- 25. River through Budapest
Down
- 1. Capital of Indonesia
- 3. Capital of Thailand
- 4. Largest lake in Africa
- 6. Ancient city known for its Acropolis
- 8. Major mountain range in North America
- 9. Mountain range along South America's west coast
- 12. Longest river in Europe
- 14. Mountain on the Nepal-China border
- 16. Capital of Peru
- 17. Major river in the USA
- 20. Mountain range home to the world's highest peaks
- 22. River central to Egyptian civilization