What are some of the scariest, most dangerous, and slummiest areas in Russia? I'm thinking of the part of a city where you regularly hear gunshots and everything is dirty and sleazy. I'd be happy with something as general as "oh yeah, Moscow has a few scary slums," but more specific information would be great. I just need to be able to name a city or area that will sound realistic to anyone who might happen to know Russia.
I tried searching "russia slums," "moscow slums," "st petersburg slums" etc but nothing really promising came up. There were historical references to slums during various times in Russia and a few pictures of some skeevy-looking areas, but nothing really frightening.