An idea has come to me, for a WoAdWriMo adventure: a rift in the earth, surrounded by ashen wasteland. Within it thrive all manner of strange beasts and factions, and at its heart lies a malevolent, fiery presence.
I'll probably refine the concept a bit as I work on it, but I'm going to keep the canyon part and probably the wasteland part. I like deserts, as fantastical locations, mostly because I read Dune at a young age, and I've never really done as much with them as I'd like.
Ideally, this'd be the kind of thing that could be dropped into a campaign on short notice. I'll try to put together some suggestions on having it as a longstanding feature of an area the players are just now exploring, and some on having it open up in a place they think they know pretty well.