I am playing Kingdom Hearts and I think there should be a secret path there in Hollow Bastion down in the Waterways. And that's because of three reasons.
(1) There are two entrances to the waterways from the Base Level. One through the bubble and the from a door. When I went through the door, I think I saw some chests which I could not get.
(2) In the waterways, I can see some switches behind some which I could not reach no matter how much I tried. There might be way to those switches.
(3) In World Terminus when you enter other worlds, all the places are the places where you can go or have gone already. But I haven't seen the room that appears in Hollow Bastion. Is there a way to that place?
If someone knows something about it, please let me know.