Rio de Janeiro, Brazil
You might be surprised to see this city on the list. After all, they have just finished hosting the Olympics. The truth is that behind the cheers and festivities of the Olympics is the sad reality of life for people in Rio. It is one of the poorest cities in Brazil. It is also one of the most violent. Even during the Olympics, visitors were looted and some were carjacked. The beaches in Rio are irresistible though. If you plan to go there, it is advised to have a local guide.
