The Most Powerful Passports in the World

They are ranked based on the travel freedom that each passport holder enjoys.
Number 1 Most powerful passport in the world: 

• United Kingdom
• United States of America

Can get access to 147 countries without a visa.

Unsurprisingly, the least powerful passports belong to Myanmar (Burma), Solomon Islands, Palestinian Territories, Sao Tome and Principe, and South Sudan with 28 visa-free countries. 

Source:
Passport Index