Well known citys in the world

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Across
  1. 2. Home of the United Nations
  2. 4. Most polluted city in the world
  3. 5. Statue of Liberty
  4. 7. Capital of Russia
  5. 9. City of drugs and prostitutes
  6. 10. European capital
  7. 13. Home of the Big Ben
  8. 14. Eiffeltower
Down
  1. 1. Biggest city in Germany
  2. 3. Coldest city in the world
  3. 6. Capital of South Africa
  4. 8. Capital of Brazil
  5. 11. Southernmost city in the world
  6. 12. Largest metropolian area in the world