Transcript from Triangle episode:
Olaf dissolves into nothing and disappears. Willow smiles hugely. Shot of Tara watching.
Buffy: (OS) Where did you send him?
Anya: (OS) The land of the trolls.
We see them all standing around in the magic shop.
Anya: He'll like it there. Full of trolls.
Willow: It's hard to be precise, though. Alternate universes don't stay put. Trying to send him to a specific place is sort of like ... like ... trying to hit a ... puppy, by throwing a live bee at it. (They all look at her) Which is a weird image, and you should all just forget it....