The 21 most powerful passports in the world

If you have citizenship in Sweden, you have a great deal of traveling power - Swedes can fly to 187 countries without a visa. This makes international travel cheaper and easier than it is for citizens of many other countries. Citizens of Afghanistan can fly to just 30 countries without a visa.

These stark differences are revealed in the Passport Index, which ranks countries based on the number of nations where residents can enter without a visa or obtain a visa on arrival. The citizenship planning firm Henley & Partners compiled government data from 200 nations, territories, and microstates to create the 2018 ranking.