[ethbr0]

Yeah, I pontificated about physical location for a while and... wow, that'd be a difficult set of negotiations.

Probably Switzerland, because, hey, Swiss and history.

Other than that, it's almost have to be as neutral / third-party of a state as you could find.

Maybe New Zealand or one of the small island nations that's willing to declare neutrality in exchange for hosting?

Islands and caves are hard to argue against.