When measuring tourism popularity, simply counting the number of visitors tells only part of the story. A more complete measure is the number of international visitor nights, which tracks the total number of nights that tourists spend in a country. So, if 100 visitors each stay for five nights, that adds up to 500 visitor nights.
This approach gives a fuller picture of how much time travelers are actually spending in each place, and how much economic activity tourism is generating for the country as a result. The figures in this gallery refer to international visitor nights in 2025 or 2024, depending on the most recent data available.
From the sunny coasts of the Mediterranean to the historic streets of the United Kingdom, let's look at the 30 European countries where international tourists spent the most time.