Travel crossword puzzle

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Across
  1. 2. Also called a "water bus"
  2. 4. Usually a country's most populated city
  3. 8. You buy them to remember a trip
  4. 10. It lands in airports
  5. 11. Australia's most famous animal
Down
  1. 1. Opposite of "arrival"
  2. 3. One of the 7 wonders of the world
  3. 5. Discovered in 1492
  4. 6. Famous seaside city in Tuscany
  5. 7. Capital of the UK
  6. 9. Mandatory document for going abroad