How about "Europe", "America", etc
List of sub-Regions
- North/South/Far Shiverpeaks
- Sparkfly Swamp
- Verdant Cascades
- Raisu Palace (... is this a sub region?)
IIRC the question whether Raisu Palace is its own region had been discussed when Proofs were first introduced and the conclusion was that it is NOT its own region.
I don't remember where the discussion took place, maybe the event site.
In that case I*d call it a sub-region even though it behaves different to the Northern/Southern Shiverpeaks.