12th one

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Across
  1. 3. - Long-necked African mammal
  2. 5. - Play area for children
  3. 7. - Exciting journey or quest
  4. 8. - Oceanic collectible
  5. 9. - Agile flying insect
  6. 12. - Radiant daytime illumination
  7. 15. - Bravery in battling blazes
  8. 16. - Large river-dwelling mammal
  9. 18. - Lush, biodiverse ecosystem
  10. 19. - Celestial nighttime radiance
  11. 21. - Sweet cacao-based treat
  12. 23. - Sweet cacao-based treat
  13. 24. - Insect with colorful wings
  14. 25. - Scientific magnification tool
Down
  1. 1. - All of space and time
  2. 2. - Cascading natural wonder
  3. 4. - Natural cascading wonder
  4. 6. - Captured image
  5. 10. - Arrangement of flowers
  6. 11. - Study of celestial objects
  7. 13. - Valuable hidden prize
  8. 14. - Colorful garden flower
  9. 17. - Device for cosmic observation
  10. 20. - Water safety supervisor
  11. 22. - Ideal, heavenly place