Across
- 3. - Ancient citadel in Athens
- 5. - Massive Arizona natural wonder
- 7. - Ancient Roman amphitheater in Italy
- 9. - Marble mausoleum in India
- 12. - Stunning waterfall on the US-Canada border
- 13. - Serene waterways in Italy's floating city
- 15. - Monument overlooking Rio de Janeiro
- 17. - Paris's iconic iron landmark
- 18. - World's largest coral reef system
- 19. - Longest wall in the world in China
Down
- 1. - Antoni Gaudí's basilica in Barcelona
- 2. - Mysterious prehistoric monument in England
- 3. - Khmer temple complex in Cambodia
- 4. - Egyptian ancient burial structures
- 6. - Rose-red city in Jordan
- 8. - Iconic Australian performing arts venue.
- 10. - Inca citadel in the Andes
- 11. - Vatican City's famous church
- 14. - Lavish palace near Paris
- 16. - Gift from France to the USA