I did a project in Puerto Rico several years back , there are basically two sections of San Juan that are ‘ safe ” for tourists , Condado and Old San Juan . In order to get to Old San Juan ( which is really cool ) , you need to take a cab , as they are not joined . You COULD walk there to save cab fare , but you have to pass through a section that is not ‘ safe ‘ . One guy on our crew did just that ………….he got mugged , they took everything he had on him , but his back fillings . Moral of the story ? You spins the wheel and take your chances , if you decide to go out on your own , knowing in advance that its not the best idea ……….if you do so , you only have yourself to blame if things go bad . Brazil is a Sh*t hole , its famous for crime and murder ……….they shouldnt be all that shocked .