This is what a brazilian “prison” looks like
youtube.com
youtube.com
I recently wanted to go to Rio, and then had a few people tell me I was completely insane and that I should never go. One of the guys who told me this knew a lot of people executed there, so I took his advice and stayed home.
I'd still be open to another opinion though...
But this is my opinion, and someone might speak about beautiful beaches in the northeast side for example - I think it doesn't worth.