6. Maceió, Brazil
Brazil has a whopping 14 of the world’s most violent cities. Maceió is the capital of the Alagoas state and sees around 135 murders per 100,000 residents each year. The city is by far the most dangerous in the country, topping even Rio de Janeiro, which most people know for its favelas, or slums. Brazil may host a large part of the Amazon rainforest, but its most populated areas are not places you want to hang out in.