Guess the cities

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Across
  1. 1. The oldest city in the world
  2. 3. highest capital in the world
  3. 5. the world's most mountainous country
  4. 8. expensive city in the world
  5. 9. statue of unity
Down
  1. 2. the cleanest city in the world
  2. 4. city where you can find Mona Lisa
  3. 6. capital city of Italy
  4. 7. city of Taj
  5. 10. The floating city