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Across
  1. 2. Highest point
  2. 5. Lets submarines see above water
  3. 6. Common crystal mineral
  4. 9. Boat in Venice
  5. 10. Early form of chemistry
  6. 13. Guides ships at sea
  7. 14. Tall, narrow monument
  8. 15. Gentle breeze
  9. 16. Fortified place or stronghold
  10. 18. Hanging bed
  11. 20. Ornate drinking cup
  12. 23. Woven decorative fabric
  13. 24. Narrow sea inlet
  14. 25. Boggy ground or a tricky situation
  15. 27. Whirling mass of air or water
  16. 28. Historical object
  17. 29. Complicated maze
  18. 30. Church tower
  19. 33. Puppet on strings
  20. 34. Percussion instrument
  21. 35. Swings back and forth
Down
  1. 1. Underground prison
  2. 3. Historical pirate
  3. 4. Intermediate floor
  4. 7. Frozen treeless region
  5. 8. A self-contradictory statement
  6. 11. Single large stone
  7. 12. Secret code
  8. 17. Ancient chemistry and mysticism
  9. 19. Handwritten document
  10. 20. Underground burial site
  11. 21. Blue-green gem or color
  12. 22. Large sailing ship
  13. 26. Slowly moving ice mass
  14. 31. Shaped ornamental plant
  15. 32. Used to view distant stars