We offer a few possibilities for you if you wish to live in a crime-ridden, destitute, and dirty city! While the world is a wonderful place to live, we've compiled a list of The Best Worst Cities Live on the Planet. Live in one of the world's worst cities. The world's most dangerous cities include Baghdad, Lagos, Damascus, Freetown, and Karachi. According to the Economist, living alone in Lagos increases your chances of becoming a victim of violence by 42%. Aside from the violence, some cities set new highs in terms of poverty, unemployment, pollution, and population. So, if you're moving to a new location, be sure you know where you shouldn't go.