25 years ago, Medellín of Colombia was dubbed as "the most dangerous city on earth"("Narcos" anyone?). I visited this impressive eternal-spring city and its Comuna 13(in my photo), which used to be the most violent neighborhood in Medellín. This notorious area tucked away in rolling mountains managed to reinvent itself from the drug and gang wars. Now it's known for the colorful houses adorned with graffiti.