hun your friend has made this up, if the people on the forum dont know about it, then it doest exist.
There are utilidoors (an underground network of corridors CM's use to get from one part of the park to the next without being seen by guests) at WDW but not Disneyland Paris, and even at WDW they are just plain corridoors with no "Disney magic" just water pipes.
Think about it, where do you put that magical card to tell the lift to go down an extra level?and like someone has already said, there is no "Lake Disney Hotel"
[youtube:2ufbffq3]http://www.youtube.com/watch?v=1FFoLJjHICU&feature=related[/youtube:2ufbffq3]