Where am I?

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Across
  1. 6. Island off England's southern coast
  2. 7. World's largest ocean
  3. 8. Mountain range in Co. Down
  4. 9. Includes Scotland, England, Wales, N.I. and R.O.I.
  5. 11. World's largest sandy desert
  6. 14. River in North America
  7. 18. What tells you on a map how much smaller it is than real life
  8. 20. South America's longest river
  9. 22. Recently made cities in NI (7and5)
  10. 23. River that forms in Dromara hills and flows into the sea at Belfast Lough
  11. 24. County that Banbridge and Downpatrick are found in
Down
  1. 1. Water off Scotland's east coast
  2. 2. Mountain range in North America
  3. 3. Water that separates Wales and ROI
  4. 4. Mountain range in Asia
  5. 5. Nigeria is in this continent
  6. 10. Large freshwater lough in the middle of N.I.
  7. 12. Mountain range in northern Africa
  8. 13. Highest mountain in the world
  9. 14. Most commonly spoken language in the world
  10. 15. Most northerly islands in British Isles
  11. 16. Study of planet earth
  12. 17. Capital of Wales
  13. 19. Only county in NI not to touch Lough Neagh
  14. 21. Smallest county in N.I.