Something BIG. Something that uses dozens of specific, real world places. Like having an adventure akin to Lord of the Rings, but instead of going to Mordor you have a bank, a library, an art museum. Earth is the strange world you must navigate to complete your quest.
Imagine a Banker, a Concierge, a Curator, and the Mayor are all fighting over a magic ring. Your job is to take the ring to the city dump to throw it away... FOREVER!
I have a few UF story seeds that arn't ready to sprout yet. I'm looking for different things to experiment with.