Church and boats moored along the canal in Amsterdam, Holland
Credit: Alexander Spatari/Getty Images

When picking a summer vacation destination, it can be hard to know where to go.

A good litmus test for choosing a great destination is polling where your friends and family are traveling, and deciding whether you want to avoid the crowds or hop on the bandwagon to visit the hottest spots.

Travel insurance company Allianz Global Assistance reviewed trips booked to Europe for the 2018 summer season from Memorial Day to Labor Day to reveal the top destinations Americans are visiting this summer.

London and Paris were at the top of the list, as they have been in years past, but the rest of the top 20 reveal travelers' changing preferences, according to Allianz. Reykjavik, for example, hopped 14 spots from last year, to become the third most popular destination this summer.

“More and more Americans are flocking to Reykjavik, Iceland, this summer, along with other new popular summer destinations like Nice,” said Daniel Durazo, director of communications at Allianz Global Assistance USA. Nice is on Allianz’s list for the first time this year, probably because it's so nice.

Take a look at the list below and see what European cities pique your interest.

Top Europe Travel Destinations for Summer 2018

  1. London, United Kingdom
  2. Paris, France
  3. Reykjavik, Iceland
  4. Rome, Italy
  5. Amsterdam, Netherlands
  6. Dublin, Ireland
  7. Barcelona, Spain
  8. Athens, Greece
  9. Madrid, Spain
  10. Frankfurt, Germany
  11. Nice, France
  12. Zurich, Switzerland
  13. Edinburgh, United Kingdom
  14. Milan, Italy
  15. Munich, Germany
  16. Prague, Czech Republic
  17. Venice, Italy
  18. Berlin, Germany
  19. Copenhagen, Denmark
  20. Florence, Italy