8. Belém, Brazil
While Brazil has been recognized as of late for its role as an emerging economic force, the countries' increasing prosperity has meant that more and more of its citizens can afford cocaine – Brazilians now consume around 18% of the world's supply.
Belém is a natural gateway for cocaine streaming in from the surrounding countries of Columbia, Bolivia, and Peru.
The dense amazonian jungle surrounding this city makes it perfect for smuggling in drugs, where they can be exported all over Brazil and around the world.
The rise in cocaine use in the country has surely contributed to Belém's place as one of the most dangerous cities in the world.