A Landmark for Every Crossword Country

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Across
  1. 4. This rift in Northern Arizona was probably begun in the Late Cretaceous, but it exposes rocks from the formation of the planet.
  2. 6. Highest freestanding mountain in the world.
  3. 9. Meaning "The Red One" in Arabic, this palace hosted the Moorish rulers of Spain until the Reconquista.
  4. 13. Volcano in Vanuatu that is the center of the John Frum Cargo Cult.
  5. 15. On the border between Brazil and Argentina, these have the highest volume of water of any waterfall in the world.
  6. 19. Temple dedicated to the Greek goddess Athena.
  7. 20. Moroccan beach known for its sea arch (plural until 2016)
  8. 24. Statues found on Easter Island.
  9. 26. This structure's application as a radio tower saved it from destruction in 1913.
  10. 28. Candy-colored cathedral in Moscow, Russia
  11. 29. Red monolith found in central Australia
  12. 30. Island known for its "dragons."
  13. 31. Begun by Qin Shi Huang, this megastructure snakes its way throughout North China.
  14. 33. Art Deco statue considered one of the New Seven Wonders of the World.
  15. 35. Bangkok's Temple of the Dawn.
  16. 36. Sea cliffs that overlook the Atlantic Ocean, located in Western Ireland.
  17. 37. Rock that overlooks the Lysefjord in Norway; its name translates to "Pulpit Rock."
Down
  1. 1. Statue of a little boy urinating that has become a beloved symbol of Brussels.
  2. 2. Mosque that originally served as a major Greek Orthodox Church.
  3. 3. Japan's famous volcano
  4. 5. Canada's oldest national park
  5. 7. Landmark seen in the constellation "Mensa."
  6. 8. The only surviving Ancient Wonder of the World.
  7. 10. One of the major cities of the Mayan Empire, located near Cancun.
  8. 11. In Maori, this fjord is known as "Piopiotahi," after a now-extinct songbird that allegedly flew through here to mourn the death of Maui.
  9. 12. Citadel located near Cuzco, the capital of the Incan Empire.
  10. 14. Costa Rica's most active volcano.
  11. 16. Roman arena used for gladiator fights, animal hunts, and executions.
  12. 17. Mughal mausoleum
  13. 18. Castle built by Bavaria's last king.
  14. 21. One of the most complete Mesopotamian structures that survives today.
  15. 22. Bay with karst islands allegedly formed from dragon's breath
  16. 23. Palace of the Qajar dynasty
  17. 25. Monastery known for its caves and gold-topped belltower
  18. 27. Beach in the Bahamas named for a species of shark that can commonly be found there.
  19. 32. Actually the name of a bell inside this famous clocktower.
  20. 34. Palace created for the Joseon Dynasty.