Eastern Europe and Russia

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Across
  1. 3. capital of Belarus
  2. 5. capital of Ukraine
  3. 6. longest river in Europe
  4. 8. mountains that arc from Poland into Romania
  5. 9. capital of Russia
  6. 11. frozen region of central Russia
  7. 14. mountains on the Balkan near the Adriatic Sea
  8. 16. disappearing lake
  9. 18. deepest freshwater lake in the world
  10. 19. major river in Poland
  11. 20. capital of Poland
Down
  1. 1. southern portion of the Carpathian Range
  2. 2. communist revolution in Russia
  3. 4. capital of Serbia
  4. 7. longest river in Russia
  5. 9. fertile valley in Bulgaria
  6. 10. rulers in Russia
  7. 12. capital of Hungary
  8. 13. mineral rich region of Poland
  9. 15. major river in Eastern Europe
  10. 17. highest peak in Europe