These are the top 20  international tourism destinations (depending on the number of visitors on annual basis), according to a recent ranking published by the United Nations World Tourism Organization.

Interesting fact: Europe boasts 12 of the 20 most-visited countries in the world.

20. Netherlands (19 million visitors)
Must to do: Explore the Canals of Amsterdam

Photo : unsplash.com/adrienolichon

19. Poland (19.6 million visitors)
Must to do: Wander the Krakow Old Town

Photo : unsplash.com/luucasfotos

18. Canada (21.1 million visitors)
Must to do: Visit the largest national park, the Jasper National Park

Photo : unsplash.com/mcouthon

17. Portugal (22.8 million visitors)
Must to do: Visit Lagos, where you will find the most impressive beaches in Portugal

Photo : unsplash.com/creech

16. Russia  (24.5 million visitors)
Must to do: Visit Moscow where the Kremlin, Red Square, and the colorful St. Basil's Cathedral are located

Photo : unsplash.com/nanichkar

15. Malaysia (25.8 million visitors)
Must to do: Explore Kuala Lumpur

Photo : unsplash.com/leventebalogh

14. Hong Kong (29.2 million visitors)
Must to do: Go to Lamma Island with the jungle greenery and the deserted beaches 

Photo : unsplash.com/florianwehde

13. Greece (30.1 million visitors)
Must to do: Visit the most romantic island, Santorini

Photo : unsplash.com/jonathangallegos

12. Austria (30.8 million visitors)
Must to do: Explore the scenic beauty of Salzburg

Photo : unsplash.com/dobiefigh

11. Japan (31.1 million visitors)
Must to do: Visit the popular temples of Kyoto

Photo : unsplash.com/boontohhgraphy

10. United Kingdom (36.3 million visitors)
Must to do: Visit London, UK' s all-in-one destination

Photo : unsplash.com/ashkya

9. Thailand (38.2 million visitors)
Must to do: Explore the mountains of the province of Mae Hong Son

Photo : unsplash.com/cadop

8. Germany (38.8 million visitors)
Must to do:Travel to Heidelberg with the medieval Old Bridge

Photo : unsplash.com/knnslens

7. Mexico (41.4 million visitors)
Must to do: Visit Cancún and the Mayan Riviera

Photo : unsplash.com/gersonrepreza

6. Turkey (45.7 million visitors)
Must to do: Explore the old city of Istanbul

Photo : unsplash.com/ashta

5. Italy (62.1 million visitors)
Must to do: Explore the beauties of Amalfi Coast

Photo : unsplash.com/khachiksimonian

4. China (62.9 million visitors)
Must to do: Reach the magnificent Great Wall of China

Photo : unsplash.com/hansonluu

3. United States (79.6 million visitors)
Must to do: For a first-time visitor, New York of course

Photo : unsplash.com/benjagremler

2. Spain ( 82.7 million visitors)
Must to do: Discover Catalan culture in Barcelona

Photo : unsplash.com/florianwehde

1. France (89.4 million visitors)
Must to do: Go to Paris, the world’s most popular tourist destination

Photo : unsplash.com/allewollenalex