Adjectives for nature

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Across
  1. 2. difficult to find/see
  2. 5. not close to many things
  3. 7. opposite of safe
  4. 9. not ruined by tourists
  5. 11. very old
  6. 12. very natural
Down
  1. 1. very small
  2. 3. something amazing
  3. 4. with lots of colours
  4. 6. opposite of wide
  5. 8. very big
  6. 10. opposite of light