Puzzle #7 (Famous Landmarks)

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Across
  1. 2. It's 277 miles long and 1 mile deep. (5, 6)
  2. 3. A 5000 year old Passage Tomb. (9)
  3. 6. The world's most famous prehistoric monument, perhaps? (10)
  4. 7. A world famous unfinished landmark. (2, 7, 7)
  5. 9. Famous gigantic Art Deco statue. (6, 3, 8)
  6. 11. A sacred symbol of Japan. (5, 4)
  7. 12. Iconic Egyptian monuments. (3, 8)
  8. 16. World's tallest building. (4, 7)
  9. 17. The world's tallest uninterrupted waterfall. (5, 5)
  10. 18. World famous mausoleum and tribute to a beloved wife. (3, 5)
Down
  1. 1. A Royal residence. (10, 6)
  2. 4. A gift of friendship from France in the 1880s. (6, 2, 7)
  3. 5. Highest palace in the world. (6, 6)
  4. 8. Ancient city carved in sandstone. (5)
  5. 10. Originally the entrance gateway to the International Exposition of 1889. (6, 5)
  6. 13. Australia's most recognizable building. (6, 5, 5)
  7. 14. One of Canada's most iconic attractions. (7, 5)
  8. 15. It opened in A.D. 80. (3, 9)
  9. 16. Famous clock tower. (3, 3)
  10. 19. Ancient Incan citadel. (5, 6)