What was the name of the place Ven, Terra, and Aqua were in the teaser trailer for Kingdom Hearts: BBS?

I just need to know the name of the place in the teaser trailer (Not the one with gameplay. The one where they're at the place with the thousands of keyblades ((That's what I wanna know the name of)) and start fighting the old man and company and stuffs) where they start fighting and everything yea. Thank you