Desert

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Across
  1. 2. Has two humps and walking
  2. 4. Drops from the sky
  3. 7. If you find one you' re lucky
  4. 8. Famous city in the desert
  5. 11. They crawl
  6. 12. Like dust
  7. 13. They look like hills
  8. 15. They sting
  9. 18. Ancient civilization
  10. 19. Flora and ..
Down
  1. 1. .. Grylls. Also the name of an animal.
  2. 2. It doesn't need water to survive
  3. 3. Three times 'warm'
  4. 5. When you are by yourself
  5. 6. No built them
  6. 9. Stay hydrated!
  7. 10. They grow there
  8. 14. The most famous one
  9. 16. A group of No
  10. 17. The wanderers of the desert