Wonders of the World Crossword

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