One of the most picturesque and colorful places in Medellin and all of Colombia is district 13 (comuna 13). Almost all visitors to the city try to get here. . . . . . Now this area is famous for its graffiti, music and street food. But even 30-40 years ago, when Medellin was the cocaine capital of Colombia, these slums were the most criminal place on earth. [youtube]74-4iX-5Bro[/youtube] The whole area is located on the slope of one of the mountains that surround Medellin.