For me, The Sanctuary Of Lava And Fire (PS1 version of The Sanctuary Of Stone And Fire, despite having the same name in the level select screen, and the optional part in the other versions) and Whale Bay. I don't consider the Walks Of Life And Power or hubs in the PS2 version levels, and I consider The Crows Nest part of The Prison Ship, and The Clearing is The Woods Of Light in the PS1 version, same with The Gloomy Island and Iron Mountain.