The Blue Hotel
You must have Action Replay for this cheat. First, turn on everything except for the "Open all Worlds and Nozzles" cheat and the "Open all 120 Shines" cheat. Next, go to any Sirena Beach where the hotel is visible before the level is over. After that, make any kind of jump so you are on top of the ledge where there are torches. Next, make your highest type of jump so you are above the edge part of the roof. You most likely should be on top of the roof of the building. Then, you will fall through. As with any Blue Wall/Flooring, you must walk around and DO NOT STAY STILL OR ELSE YOU WILL MOST LIKELY DIE. Good luck getting out. I have not found a way out yet.
Added by: LumaBlooper Jul 6th 2008, ID#8501