What's the most awesomely gritty world in science fiction or fantasy?

Lots and lots of fantasy universes try to be "dark" or "gritty," or "realistic" — but only some of them actually feel like places where you could get into amazing trouble. Places where you can actually feel the grime on every surface. What's your favorite "gritty" world from either science fiction or fantasy?

Please include a picture or clip of your chosen world, and identify where it comes from. Thanks!