Key moments in the history of the tourism

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Across
  1. 4. A word describing the exploration of unknown places in the 16th and 17th centuries
  2. 5. The Italian city where Thomas Cook organized the first tour package
  3. 8. The first online booking service
  4. 11. An event that democratized air travel in the 1970s
  5. 12. An 1851 event that attracted international visitors to London
Down
  1. 1. An era characterized by a strong growth in mass tourism
  2. 2. The invention that allowed fast transatlantic travel in the 1950s
  3. 3. A famous transatlantic shipping company founded in 1839
  4. 6. A document needed for international travel
  5. 7. One of the earliest forms of organized tourism
  6. 9. A famous tourist destination opened in 1955 in California
  7. 10. The first written travel guide