Worst shitholes in fiction?

Skid Row from Little Shop of Horrors is like. The Ur-Shithole. As the song itself says, the cabs don't stop, the food is slop, the hop heads (drug addicts) flop in the snow, the guys are drips, they rip your slips, whatever the fuck that means, your life's a mess, and, most tellingly, depression is just status quo.

Seymour's willing to do anything to get out of this awful place, and honestly, I can't fucking blame him, the place seems like it sucks. Plant based murder's a little much, but I can respect the spirit behind it.