The right key? [ its?? a possibility??? but shitty jokes aside, dick leans back a bit, straightening up by reflex as he thinks. ] It depends on what there actually is. Are the buildings physical at all? We're directly transported to them when we request a talk. I've been working under the assumption they're their own... pocket dimensions, but it could also be that they're simply on a different plane of existence, like the Tower of Fate. [ dick does not explain what that is, at all. ]