So I just did the Namira quest for the first time see (I've been playing since release day fyi) and, after thinking about it, Markarth is absolutely one of the most dangerous, psychopathic, and disturbing places I've been in a video game.
First the Forsworn Questline
Then the Molag Bal questline
Now the Namira questline.
Also, the Stallion Potion.
And here I thought Riften was a crap city.