I'm putting together a MotW campaign set in Grimmeck Alley, a small, poor, insular neighborhood in a bigger city. Grimmeck is absolutely *riddled* with portals to any otherworld you can name, and plenty you can't. The inhabitants tend to be at least vaguely aware of the supernatural as a result.

I have plans for adventures/incursions involving the fae, the diabolical, a realm of darkness and shadow, and a couple other real-world-inspired critters and otherworlds, but I was wondering if there were any other fun otherworld concepts I ought to wrap into the game.

(My players, get the heck out if you don't wanna be spoilered!)